28997632 has 24 divisors (see below), whose sum is σ = 57985200. Its totient is φ = 14497792.

The previous prime is 28997623. The next prime is 28997653. The reversal of 28997632 is 23679982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5032 + ... + 9127.

It is an arithmetic number, because the mean of its divisors is an integer number (2416050).

Almost surely, 2^28997632 is an apocalyptic number.

It is an amenable number.

28997632 is a deficient number, since it is larger than the sum of its proper divisors (28987568).

28997632 is an equidigital number, since it uses as much as digits as its factorization.

28997632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14181 (or 14161 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 28997632 is about 5384.9449393657. The cubic root of 28997632 is about 307.2233199890.

The spelling of 28997632 in words is "twenty-eight million, nine hundred ninety-seven thousand, six hundred thirty-two".