28979568 has 30 divisors (see below), whose sum is σ = 81102944. Its totient is φ = 9659808.

The previous prime is 28979567. The next prime is 28979569. The reversal of 28979568 is 86597982.

It is a happy number.

28979568 is a `hidden beast` number, since 2 + 8 + 9 + 79 + 568 = 666.

It is an interprime number because it is at equal distance from previous prime (28979567) and next prime (28979569).

It is a super-2 number, since 2×28979568² = 1679630722933248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100480 + ... + 100767.

Almost surely, 2^28979568 is an apocalyptic number.

It is an amenable number.

28979568 is an abundant number, since it is smaller than the sum of its proper divisors (52123376).

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

28979568 is a wasteful number, since it uses less digits than its factorization.

28979568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201261 (or 201252 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 28979568 is about 5383.2674092971. The cubic root of 28979568 is about 307.1595120794.

The spelling of 28979568 in words is "twenty-eight million, nine hundred seventy-nine thousand, five hundred sixty-eight".