39397664 has 12 divisors (see below), whose sum is σ = 77564214. Its totient is φ = 19698816.

The previous prime is 39397661. The next prime is 39397667. The reversal of 39397664 is 46679393.

It is an interprime number because it is at equal distance from previous prime (39397661) and next prime (39397667).

It can be written as a sum of positive squares in only one way, i.e., 20976400 + 18421264 = 4580^2 + 4292^2 .

It is not an unprimeable number, because it can be changed into a prime (39397661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615557 + ... + 615620.

Almost surely, 2^39397664 is an apocalyptic number.

It is an amenable number.

39397664 is a deficient number, since it is larger than the sum of its proper divisors (38166550).

39397664 is a wasteful number, since it uses less digits than its factorization.

39397664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231187 (or 1231179 counting only the distinct ones).

The product of its digits is 734832, while the sum is 47.

The square root of 39397664 is about 6276.7558499594. The cubic root of 39397664 is about 340.2698664817.

The spelling of 39397664 in words is "thirty-nine million, three hundred ninety-seven thousand, six hundred sixty-four".