138163360 has 24 divisors (see below), whose sum is σ = 326411316. Its totient is φ = 55265280.

The previous prime is 138163357. The next prime is 138163391. The reversal of 138163360 is 63361831.

It can be written as a sum of positive squares in 2 ways, for example, as 137264656 + 898704 = 11716^2 + 948^2 .

It is a super-2 number, since 2×138163360² = 38178228092979200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431601 + ... + 431920.

Almost surely, 2^138163360 is an apocalyptic number.

138163360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138163360 is an abundant number, since it is smaller than the sum of its proper divisors (188247956).

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

138163360 is an equidigital number, since it uses as much as digits as its factorization.

138163360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863536 (or 863528 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 138163360 is about 11754.2911313273. The cubic root of 138163360 is about 516.9687547758.

The spelling of 138163360 in words is "one hundred thirty-eight million, one hundred sixty-three thousand, three hundred sixty".