39564940 has 24 divisors (see below), whose sum is σ = 83340432. Its totient is φ = 15777600.

The previous prime is 39564923. The next prime is 39564983. The reversal of 39564940 is 4946593.

It is a junction number, because it is equal to n+sod(n) for n = 39564893 and 39564902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4090 + ... + 9790.

It is an arithmetic number, because the mean of its divisors is an integer number (3472518).

Almost surely, 2^39564940 is an apocalyptic number.

It is an amenable number.

39564940 is an abundant number, since it is smaller than the sum of its proper divisors (43775492).

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

39564940 is a wasteful number, since it uses less digits than its factorization.

39564940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6057 (or 6055 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 39564940 is about 6290.0667723006. The cubic root of 39564940 is about 340.7507631448.

It can be divided in two parts, 39564 and 940, that added together give a palindrome (40504).

The spelling of 39564940 in words is "thirty-nine million, five hundred sixty-four thousand, nine hundred forty".