39630928 has 20 divisors (see below), whose sum is σ = 78659028. Its totient is φ = 19331840.

The previous prime is 39630919. The next prime is 39630971. The reversal of 39630928 is 82903693.

It can be written as a sum of positive squares in 2 ways, for example, as 17239104 + 22391824 = 4152^2 + 4732^2 .

It is a super-2 number, since 2×39630928² = 3141220908282368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29551 + ... + 30862.

Almost surely, 2^39630928 is an apocalyptic number.

It is an amenable number.

39630928 is a deficient number, since it is larger than the sum of its proper divisors (39028100).

39630928 is a wasteful number, since it uses less digits than its factorization.

39630928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60462 (or 60456 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 39630928 is about 6295.3100003098. The cubic root of 39630928 is about 340.9400972052.

The spelling of 39630928 in words is "thirty-nine million, six hundred thirty thousand, nine hundred twenty-eight".