39906879264 has 72 divisors (see below), whose sum is σ = 129697364160. Its totient is φ = 11401964928.

The previous prime is 39906879263. The next prime is 39906879373. The reversal of 39906879264 is 46297860993.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (39906879263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9895524 + ... + 9899555.

It is an arithmetic number, because the mean of its divisors is an integer number (1801352280).

Almost surely, 2^39906879264 is an apocalyptic number.

It is an amenable number.

39906879264 is an abundant number, since it is smaller than the sum of its proper divisors (89790484896).

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

39906879264 is a wasteful number, since it uses less digits than its factorization.

39906879264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19795102 (or 19795091 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 39906879264 in words is "thirty-nine billion, nine hundred six million, eight hundred seventy-nine thousand, two hundred sixty-four".