28920364 has 12 divisors (see below), whose sum is σ = 55211688. Its totient is φ = 13145600.

The previous prime is 28920343. The next prime is 28920371. The reversal of 28920364 is 46302982.

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, 328597 + ... + 328684.

It is an arithmetic number, because the mean of its divisors is an integer number (4600974).

Almost surely, 2^28920364 is an apocalyptic number.

It is an amenable number.

28920364 is a deficient number, since it is larger than the sum of its proper divisors (26291324).

28920364 is a wasteful number, since it uses less digits than its factorization.

28920364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657296 (or 657294 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28920364 is about 5377.7657070572. The cubic root of 28920364 is about 306.9501982898.

The spelling of 28920364 in words is "twenty-eight million, nine hundred twenty thousand, three hundred sixty-four".