3938578624 has 28 divisors (see below), whose sum is σ = 8085124800. Its totient is φ = 1901381888.

The previous prime is 3938578621. The next prime is 3938578639. The reversal of 3938578624 is 4268758393.

It is not an unprimeable number, because it can be changed into a prime (3938578621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059184 + ... + 1062895.

Almost surely, 2^3938578624 is an apocalyptic number.

It is an amenable number.

3938578624 is an abundant number, since it is smaller than the sum of its proper divisors (4146546176).

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

3938578624 is a wasteful number, since it uses less digits than its factorization.

3938578624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122120 (or 2122110 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The square root of 3938578624 is about 62758.0960832943. The cubic root of 3938578624 is about 1579.2340762404.

The spelling of 3938578624 in words is "three billion, nine hundred thirty-eight million, five hundred seventy-eight thousand, six hundred twenty-four".