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28056168 = 2332755667
BaseRepresentation
bin110101100000…
…1101001101000
31221210101211100
41223001221220
524140244133
62441201400
7460321260
oct153015150
957711740
1028056168
1114923018
129490260
135a742aa
143a247a0
1526e2e13
hex1ac1a68

28056168 has 48 divisors (see below), whose sum is σ = 86842080. Its totient is φ = 8015904.

The previous prime is 28056143. The next prime is 28056187. The reversal of 28056168 is 86165082.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27330 + ... + 28337.

It is an arithmetic number, because the mean of its divisors is an integer number (1809210).

Almost surely, 228056168 is an apocalyptic number.

28056168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28056168 is an abundant number, since it is smaller than the sum of its proper divisors (58785912).

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

28056168 is a wasteful number, since it uses less digits than its factorization.

28056168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55686 (or 55679 counting only the distinct ones).

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

The square root of 28056168 is about 5296.8073402758. The cubic root of 28056168 is about 303.8618081508.

It can be divided in two parts, 28056 and 168, that added together give a square (28224 = 1682).

The spelling of 28056168 in words is "twenty-eight million, fifty-six thousand, one hundred sixty-eight".

Divisors: 1 2 3 4 6 7 8 9 12 14 18 21 24 28 36 42 56 63 72 84 126 168 252 504 55667 111334 167001 222668 334002 389669 445336 501003 668004 779338 1002006 1169007 1336008 1558676 2004012 2338014 3117352 3507021 4008024 4676028 7014042 9352056 14028084 28056168