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28826080 = 255672689
BaseRepresentation
bin110110111110…
…1100111100000
32000020111221121
41231331213200
524334413310
62505502024
7500006023
oct155754740
960214847
1028826080
11152a9508
1297a1914
135c8386a
143b851ba
1527e60da
hex1b7d9e0

28826080 has 48 divisors (see below), whose sum is σ = 69143760. Its totient is φ = 11354112.

The previous prime is 28826069. The next prime is 28826081. The reversal of 28826080 is 8062882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28826081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9376 + ... + 12064.

It is an arithmetic number, because the mean of its divisors is an integer number (1440495).

Almost surely, 228826080 is an apocalyptic number.

28826080 is a gapful number since it is divisible by the number (20) 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 28826080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34571880).

28826080 is an abundant number, since it is smaller than the sum of its proper divisors (40317680).

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

28826080 is a wasteful number, since it uses less digits than its factorization.

28826080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771 (or 2763 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 28826080 is about 5368.9924566905. The cubic root of 28826080 is about 306.6162698112.

The spelling of 28826080 in words is "twenty-eight million, eight hundred twenty-six thousand, eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 67 80 134 160 268 335 536 670 1072 1340 2144 2680 2689 5360 5378 10720 10756 13445 21512 26890 43024 53780 86048 107560 180163 215120 360326 430240 720652 900815 1441304 1801630 2882608 3603260 5765216 7206520 14413040 28826080