28912704 has 28 divisors (see below), whose sum is σ = 76498704. Its totient is φ = 9637504.

The previous prime is 28912687. The next prime is 28912721. The reversal of 28912704 is 40721982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28912687) and next prime (28912721).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75102 + ... + 75485.

Almost surely, 2^28912704 is an apocalyptic number.

28912704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28912704 is an abundant number, since it is smaller than the sum of its proper divisors (47586000).

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

28912704 is a wasteful number, since it uses less digits than its factorization.

28912704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150602 (or 150592 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 28912704 is about 5377.0534682110. The cubic root of 28912704 is about 306.9230957479.

The spelling of 28912704 in words is "twenty-eight million, nine hundred twelve thousand, seven hundred four".