39945372 has 36 divisors (see below), whose sum is σ = 98380296. Its totient is φ = 12612960.

The previous prime is 39945349. The next prime is 39945397. The reversal of 39945372 is 27354993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279 + ... + 8942.

It is an arithmetic number, because the mean of its divisors is an integer number (2732786).

Almost surely, 2^39945372 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 39945372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49190148).

39945372 is an abundant number, since it is smaller than the sum of its proper divisors (58434924).

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

39945372 is a wasteful number, since it uses less digits than its factorization.

39945372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9266 (or 9245 counting only the distinct ones).

The product of its digits is 204120, while the sum is 42.

The square root of 39945372 is about 6320.2351222087. The cubic root of 39945372 is about 341.8394307973.

The spelling of 39945372 in words is "thirty-nine million, nine hundred forty-five thousand, three hundred seventy-two".