32997728 has 24 divisors (see below), whose sum is σ = 65404080. Its totient is φ = 16387200.

The previous prime is 32997719. The next prime is 32997739. The reversal of 32997728 is 82779923.

It is a congruent number.

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, 1418 + ... + 8246.

It is an arithmetic number, because the mean of its divisors is an integer number (2725170).

Almost surely, 2^32997728 is an apocalyptic number.

It is an amenable number.

32997728 is a deficient number, since it is larger than the sum of its proper divisors (32406352).

32997728 is a wasteful number, since it uses less digits than its factorization.

32997728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6990 (or 6982 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 32997728 is about 5744.3648909170. The cubic root of 32997728 is about 320.7460717014.

The spelling of 32997728 in words is "thirty-two million, nine hundred ninety-seven thousand, seven hundred twenty-eight".