39664872 has 96 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 11802240.

The previous prime is 39664853. The next prime is 39664907. The reversal of 39664872 is 27846693.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28333 + ... + 29699.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^39664872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39664872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59754240).

39664872 is an abundant number, since it is smaller than the sum of its proper divisors (79843608).

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

39664872 is a wasteful number, since it uses less digits than its factorization.

39664872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1416 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 39664872 is about 6298.0053985369. The cubic root of 39664872 is about 341.0374081418.

The spelling of 39664872 in words is "thirty-nine million, six hundred sixty-four thousand, eight hundred seventy-two".