39449664 has 42 divisors (see below), whose sum is σ = 113076990. Its totient is φ = 13149696.

The previous prime is 39449647. The next prime is 39449747. The reversal of 39449664 is 46694493.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 34574400 + 4875264 = 5880^2 + 2208^2 .

It is a nude number because it is divisible by every one of its digits.

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 5 ways as a sum of consecutive naturals, for example, 33669 + ... + 34820.

Almost surely, 2^39449664 is an apocalyptic number.

It is an amenable number.

39449664 is an abundant number, since it is smaller than the sum of its proper divisors (73627326).

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

39449664 is a wasteful number, since it uses less digits than its factorization.

39449664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68507 (or 68494 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 39449664 is about 6280.8967512609. The cubic root of 39449664 is about 340.4195052532.

The spelling of 39449664 in words is "thirty-nine million, four hundred forty-nine thousand, six hundred sixty-four".