39431980 has 48 divisors (see below), whose sum is σ = 95993856. Its totient is φ = 13325760.

The previous prime is 39431941. The next prime is 39431983. The reversal of 39431980 is 8913493.

It is not an unprimeable number, because it can be changed into a prime (39431983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7957 + ... + 11923.

It is an arithmetic number, because the mean of its divisors is an integer number (1999872).

Almost surely, 2^39431980 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 39431980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47996928).

39431980 is an abundant number, since it is smaller than the sum of its proper divisors (56561876).

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

39431980 is a wasteful number, since it uses less digits than its factorization.

39431980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054 (or 4052 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 39431980 is about 6279.4888326997. The cubic root of 39431980 is about 340.3686313237.

The spelling of 39431980 in words is "thirty-nine million, four hundred thirty-one thousand, nine hundred eighty".