39513964 has 24 divisors (see below), whose sum is σ = 81579008. Its totient is φ = 16387920.

The previous prime is 39513961. The next prime is 39513997. The reversal of 39513964 is 46931593.

It is a super-2 number, since 2×39513964² = 3122706701986592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39513961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21894 + ... + 23629.

Almost surely, 2^39513964 is an apocalyptic number.

It is an amenable number.

39513964 is an abundant number, since it is smaller than the sum of its proper divisors (42065044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39513964 is a wasteful number, since it uses less digits than its factorization.

39513964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45565 (or 45563 counting only the distinct ones).

The product of its digits is 87480, while the sum is 40.

The square root of 39513964 is about 6286.0133630147. The cubic root of 39513964 is about 340.6043576302.

The spelling of 39513964 in words is "thirty-nine million, five hundred thirteen thousand, nine hundred sixty-four".