39505664 has 36 divisors (see below), whose sum is σ = 86031960. Its totient is φ = 17955840.

The previous prime is 39505663. The next prime is 39505667. The reversal of 39505664 is 46650593.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39505663) by changing a digit.

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, 4199 + ... + 9830.

Almost surely, 2^39505664 is an apocalyptic number.

It is an amenable number.

39505664 is an abundant number, since it is smaller than the sum of its proper divisors (46526296).

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

39505664 is a wasteful number, since it uses less digits than its factorization.

39505664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056 (or 14042 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 39505664 is about 6285.3531324819. The cubic root of 39505664 is about 340.5805077145.

Subtracting 39505664 from its reverse (46650593), we obtain a square (7144929 = 2673²).

The spelling of 39505664 in words is "thirty-nine million, five hundred five thousand, six hundred sixty-four".