28997528 has 32 divisors (see below), whose sum is σ = 62415360. Its totient is φ = 12372000.

The previous prime is 28997491. The next prime is 28997531. The reversal of 28997528 is 82579982.

It is a super-2 number, since 2×28997528² = 1681713260221568, 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 7 ways as a sum of consecutive naturals, for example, 13025 + ... + 15087.

It is an arithmetic number, because the mean of its divisors is an integer number (1950480).

Almost surely, 2^28997528 is an apocalyptic number.

28997528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28997528 is an abundant number, since it is smaller than the sum of its proper divisors (33417832).

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

28997528 is a wasteful number, since it uses less digits than its factorization.

28997528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327 (or 2323 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 28997528 is about 5384.9352828052. The cubic root of 28997528 is about 307.2229527031. Note that the first 3 decimals are identical.

The spelling of 28997528 in words is "twenty-eight million, nine hundred ninety-seven thousand, five hundred twenty-eight".