9138888320 has 64 divisors (see below), whose sum is σ = 22601068200. Its totient is φ = 3529494528.

The previous prime is 9138888277. The next prime is 9138888347. The reversal of 9138888320 is 238888319.

It can be written as a sum of positive squares in 4 ways, for example, as 7886860864 + 1252027456 = 88808^2 + 35384^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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, 227639 + ... + 264758.

Almost surely, 2^9138888320 is an apocalyptic number.

It is an amenable number.

9138888320 is an abundant number, since it is smaller than the sum of its proper divisors (13462179880).

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

9138888320 is a wasteful number, since it uses less digits than its factorization.

9138888320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492445 (or 492433 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 9138888320 is about 95597.5330225629. The cubic root of 9138888320 is about 2090.7292251718.

The spelling of 9138888320 in words is "nine billion, one hundred thirty-eight million, eight hundred eighty-eight thousand, three hundred twenty".