7638937044 has 48 divisors (see below), whose sum is σ = 18469355520. Its totient is φ = 2454772320.

The previous prime is 7638937039. The next prime is 7638937079. The reversal of 7638937044 is 4407398367.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58797 + ... + 136875.

It is an arithmetic number, because the mean of its divisors is an integer number (384778240).

Almost surely, 2^7638937044 is an apocalyptic number.

It is an amenable number.

7638937044 is an abundant number, since it is smaller than the sum of its proper divisors (10830418476).

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

7638937044 is a wasteful number, since it uses less digits than its factorization.

7638937044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78380 (or 78378 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The square root of 7638937044 is about 87401.0128316600. The cubic root of 7638937044 is about 1969.4470558550.

The spelling of 7638937044 in words is "seven billion, six hundred thirty-eight million, nine hundred thirty-seven thousand, forty-four".