28971832 has 16 divisors (see below), whose sum is σ = 55243800. Its totient is φ = 14240160.

The previous prime is 28971793. The next prime is 28971847. The reversal of 28971832 is 23817982.

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, 30219 + ... + 31162.

Almost surely, 2^28971832 is an apocalyptic number.

It is an amenable number.

28971832 is a deficient number, since it is larger than the sum of its proper divisors (26271968).

28971832 is a wasteful number, since it uses less digits than its factorization.

28971832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61446 (or 61442 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 28971832 is about 5382.5488386080. The cubic root of 28971832 is about 307.1321779078.

The spelling of 28971832 in words is "twenty-eight million, nine hundred seventy-one thousand, eight hundred thirty-two".