2639404972 has 12 divisors (see below), whose sum is σ = 4890662280. Its totient is φ = 1242072896.

The previous prime is 2639404961. The next prime is 2639404979. The reversal of 2639404972 is 2794049362.

It is not an unprimeable number, because it can be changed into a prime (2639404979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19407322 + ... + 19407457.

It is an arithmetic number, because the mean of its divisors is an integer number (407555190).

Almost surely, 2^2639404972 is an apocalyptic number.

It is an amenable number.

2639404972 is a deficient number, since it is larger than the sum of its proper divisors (2251257308).

2639404972 is a wasteful number, since it uses less digits than its factorization.

2639404972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38814800 (or 38814798 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 2639404972 is about 51375.1396299806. The cubic root of 2639404972 is about 1381.9808024599.

The spelling of 2639404972 in words is "two billion, six hundred thirty-nine million, four hundred four thousand, nine hundred seventy-two".