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28982052 = 223211163449
BaseRepresentation
bin110111010001…
…1101100100100
32000112102220100
41232203230210
524404411202
62513104100
7501225531
oct156435444
960472810
1028982052
11153a5710
129858030
136009858
143bc5d88
15282741c
hex1ba3b24

28982052 has 72 divisors (see below), whose sum is σ = 80589600. Its totient is φ = 8709120.

The previous prime is 28982021. The next prime is 28982053. The reversal of 28982052 is 25028982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28981998 and 28982016.

It is not an unprimeable number, because it can be changed into a prime (28982053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64324 + ... + 64772.

It is an arithmetic number, because the mean of its divisors is an integer number (1119300).

Almost surely, 228982052 is an apocalyptic number.

28982052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28982052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40294800).

28982052 is an abundant number, since it is smaller than the sum of its proper divisors (51607548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28982052 is a wasteful number, since it uses less digits than its factorization.

28982052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28982052 is about 5383.4981192529. The cubic root of 28982052 is about 307.1682879456.

It can be divided in two parts, 2898 and 2052, that added together give a triangular number (4950 = T99).

The spelling of 28982052 in words is "twenty-eight million, nine hundred eighty-two thousand, fifty-two".

Divisors: 1 2 3 4 6 9 11 12 18 22 33 36 44 66 99 132 163 198 326 396 449 489 652 898 978 1347 1467 1793 1796 1956 2694 2934 3586 4041 4939 5379 5388 5868 7172 8082 9878 10758 14817 16137 16164 19756 21516 29634 32274 44451 59268 64548 73187 88902 146374 177804 219561 292748 439122 658683 805057 878244 1317366 1610114 2415171 2634732 3220228 4830342 7245513 9660684 14491026 28982052