39805980440 has 32 divisors (see below), whose sum is σ = 90207810000. Its totient is φ = 15807840384.

The previous prime is 39805980421. The next prime is 39805980449. The reversal of 39805980440 is 4408950893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39805980449) 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, 3574115 + ... + 3585234.

Almost surely, 2^39805980440 is an apocalyptic number.

It is an amenable number.

39805980440 is an abundant number, since it is smaller than the sum of its proper divisors (50401829560).

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

39805980440 is a wasteful number, since it uses less digits than its factorization.

39805980440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7159499 (or 7159495 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 39805980440 in words is "thirty-nine billion, eight hundred five million, nine hundred eighty thousand, four hundred forty".