39664120 has 16 divisors (see below), whose sum is σ = 89244360. Its totient is φ = 15865632.

The previous prime is 39664117. The next prime is 39664127. The reversal of 39664120 is 2146693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39664127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495762 + ... + 495841.

Almost surely, 2^39664120 is an apocalyptic number.

It is an amenable number.

39664120 is an abundant number, since it is smaller than the sum of its proper divisors (49580240).

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

39664120 is a wasteful number, since it uses less digits than its factorization.

39664120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991614 (or 991610 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 39664120 is about 6297.9456968126. The cubic root of 39664120 is about 341.0352529035.

It can be divided in two parts, 396 and 64120, that added together give a square (64516 = 254²).

The spelling of 39664120 in words is "thirty-nine million, six hundred sixty-four thousand, one hundred twenty".