39902372 has 6 divisors (see below), whose sum is σ = 69829158. Its totient is φ = 19951184.

The previous prime is 39902371. The next prime is 39902399. The reversal of 39902372 is 27320993.

It can be written as a sum of positive squares in only one way, i.e., 24661156 + 15241216 = 4966^2 + 3904^2 .

It is not an unprimeable number, because it can be changed into a prime (39902371) 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 as a sum of consecutive naturals, namely, 4987793 + ... + 4987800.

It is an arithmetic number, because the mean of its divisors is an integer number (11638193).

Almost surely, 2^39902372 is an apocalyptic number.

It is an amenable number.

39902372 is a deficient number, since it is larger than the sum of its proper divisors (29926786).

39902372 is a wasteful number, since it uses less digits than its factorization.

39902372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9975597 (or 9975595 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 39902372 is about 6316.8324340606. The cubic root of 39902372 is about 341.7167267783.

The spelling of 39902372 in words is "thirty-nine million, nine hundred two thousand, three hundred seventy-two".