39397937440 has 48 divisors (see below), whose sum is σ = 95593253112. Its totient is φ = 15333249024.

The previous prime is 39397937357. The next prime is 39397937459. The reversal of 39397937440 is 4473979393.

It can be written as a sum of positive squares in 4 ways, for example, as 39395898256 + 2039184 = 198484^2 + 1428^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3321609 + ... + 3333448.

Almost surely, 2^39397937440 is an apocalyptic number.

It is an amenable number.

39397937440 is an abundant number, since it is smaller than the sum of its proper divisors (56195315672).

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

39397937440 is a wasteful number, since it uses less digits than its factorization.

39397937440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6655109 (or 6655101 counting only the distinct ones).

The product of its (nonzero) digits is 15431472, while the sum is 58.

The spelling of 39397937440 in words is "thirty-nine billion, three hundred ninety-seven million, nine hundred thirty-seven thousand, four hundred forty".