2638901388 has 24 divisors (see below), whose sum is σ = 6161602608. Its totient is φ = 879038656.

The previous prime is 2638901359. The next prime is 2638901401. The reversal of 2638901388 is 8831098362.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55731 + ... + 91562.

It is an arithmetic number, because the mean of its divisors is an integer number (256733442).

Almost surely, 2^2638901388 is an apocalyptic number.

It is an amenable number.

2638901388 is an abundant number, since it is smaller than the sum of its proper divisors (3522701220).

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

2638901388 is a wasteful number, since it uses less digits than its factorization.

2638901388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148793 (or 148791 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 2638901388 is about 51370.2383486781. The cubic root of 2638901388 is about 1381.8929054157.

The spelling of 2638901388 in words is "two billion, six hundred thirty-eight million, nine hundred one thousand, three hundred eighty-eight".