28864704 has 112 divisors (see below), whose sum is σ = 84856320. Its totient is φ = 8586240.

The previous prime is 28864673. The next prime is 28864723. The reversal of 28864704 is 40746882.

It is a super-2 number, since 2×28864704² = 1666342274015232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166762 + ... + 166934.

Almost surely, 2^28864704 is an apocalyptic number.

28864704 is a gapful number since it is divisible by the number (24) 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 28864704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42428160).

28864704 is an abundant number, since it is smaller than the sum of its proper divisors (55991616).

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

28864704 is a wasteful number, since it uses less digits than its factorization.

28864704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 28864704 is about 5372.5882030917. The cubic root of 28864704 is about 306.7531535103.

The spelling of 28864704 in words is "twenty-eight million, eight hundred sixty-four thousand, seven hundred four".