39928172 has 12 divisors (see below), whose sum is σ = 73984680. Its totient is φ = 18789696.

The previous prime is 39928129. The next prime is 39928193. The reversal of 39928172 is 27182993.

It is a happy number.

It is a super-3 number, since 3×39928172³ (a number of 24 digits) contains 333 as substring.

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, 293522 + ... + 293657.

It is an arithmetic number, because the mean of its divisors is an integer number (6165390).

Almost surely, 2^39928172 is an apocalyptic number.

It is an amenable number.

39928172 is a deficient number, since it is larger than the sum of its proper divisors (34056508).

39928172 is a wasteful number, since it uses less digits than its factorization.

39928172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587200 (or 587198 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 39928172 is about 6318.8742668295. The cubic root of 39928172 is about 341.7903597617.

The spelling of 39928172 in words is "thirty-nine million, nine hundred twenty-eight thousand, one hundred seventy-two".