39920972 has 24 divisors (see below), whose sum is σ = 85984416. Its totient is φ = 15792768.

The previous prime is 39920971. The next prime is 39920977. The reversal of 39920972 is 27902993.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (39920971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54473 + ... + 55200.

It is an arithmetic number, because the mean of its divisors is an integer number (3582684).

Almost surely, 2^39920972 is an apocalyptic number.

It is an amenable number.

39920972 is an abundant number, since it is smaller than the sum of its proper divisors (46063444).

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

39920972 is a wasteful number, since it uses less digits than its factorization.

39920972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109697 (or 109695 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 39920972 is about 6318.3045194103. The cubic root of 39920972 is about 341.7698142137.

The spelling of 39920972 in words is "thirty-nine million, nine hundred twenty thousand, nine hundred seventy-two".