28997256 has 16 divisors (see below), whose sum is σ = 72493200. Its totient is φ = 9665744.

The previous prime is 28997239. The next prime is 28997299. The reversal of 28997256 is 65279982.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604086 + ... + 604133.

It is an arithmetic number, because the mean of its divisors is an integer number (4530825).

Almost surely, 2^28997256 is an apocalyptic number.

It is an amenable number.

28997256 is an abundant number, since it is smaller than the sum of its proper divisors (43495944).

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

28997256 is a wasteful number, since it uses less digits than its factorization.

28997256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208228 (or 1208224 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 28997256 is about 5384.9100271035. The cubic root of 28997256 is about 307.2219921050.

The spelling of 28997256 in words is "twenty-eight million, nine hundred ninety-seven thousand, two hundred fifty-six".