28159056 has 40 divisors (see below), whose sum is σ = 80828160. Its totient is φ = 9386208.

The previous prime is 28159051. The next prime is 28159057. The reversal of 28159056 is 65095182.

It is a happy number.

It is a super-2 number, since 2×28159056² = 1585864869622272, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28159056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28159051) 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, 32160 + ... + 33023.

It is an arithmetic number, because the mean of its divisors is an integer number (2020704).

Almost surely, 2^28159056 is an apocalyptic number.

It is an amenable number.

28159056 is an abundant number, since it is smaller than the sum of its proper divisors (52669104).

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

28159056 is a wasteful number, since it uses less digits than its factorization.

28159056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65200 (or 65188 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 28159056 is about 5306.5107179765. The cubic root of 28159056 is about 304.2327972139.

The spelling of 28159056 in words is "twenty-eight million, one hundred fifty-nine thousand, fifty-six".