39972361 has 32 divisors (see below), whose sum is σ = 49545216. Its totient is φ = 31752000.

The previous prime is 39972349. The next prime is 39972377. The reversal of 39972361 is 16327993.

It is a cyclic number.

It is not a de Polignac number, because 39972361 - 2⁵ = 39972329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39972301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314680 + ... + 314806.

It is an arithmetic number, because the mean of its divisors is an integer number (1548288).

Almost surely, 2^39972361 is an apocalyptic number.

39972361 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

39972361 is a deficient number, since it is larger than the sum of its proper divisors (9572855).

39972361 is a wasteful number, since it uses less digits than its factorization.

39972361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its digits is 61236, while the sum is 40.

The square root of 39972361 is about 6322.3698879455. The cubic root of 39972361 is about 341.9164011437.

The spelling of 39972361 in words is "thirty-nine million, nine hundred seventy-two thousand, three hundred sixty-one".