39999964 has 6 divisors (see below), whose sum is σ = 69999944. Its totient is φ = 19999980.

The previous prime is 39999943. The next prime is 39999979. The reversal of 39999964 is 46999993.

39999964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 39999899 and 39999908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999992 + ... + 4999999.

Almost surely, 2^39999964 is an apocalyptic number.

It is an amenable number.

39999964 is a deficient number, since it is larger than the sum of its proper divisors (29999980).

39999964 is a wasteful number, since it uses less digits than its factorization.

39999964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999995 (or 9999993 counting only the distinct ones).

The product of its digits is 4251528, while the sum is 58.

The square root of 39999964 is about 6324.5524742862. The cubic root of 39999964 is about 341.9950867368.

It can be divided in two parts, 3999996 and 4, that added together give a square (4000000 = 2000²).

The spelling of 39999964 in words is "thirty-nine million, nine hundred ninety-nine thousand, nine hundred sixty-four".