138172370 has 32 divisors (see below), whose sum is σ = 299203200. Its totient is φ = 44879616.

The previous prime is 138172369. The next prime is 138172421. The reversal of 138172370 is 73271831.

138172370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 50615 + ... + 53274.

It is an arithmetic number, because the mean of its divisors is an integer number (9350100).

Almost surely, 2^138172370 is an apocalyptic number.

138172370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138172370 is an abundant number, since it is smaller than the sum of its proper divisors (161030830).

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

138172370 is a wasteful number, since it uses less digits than its factorization.

138172370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103922.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 138172370 is about 11754.6743893653. The cubic root of 138172370 is about 516.9799921672.

The spelling of 138172370 in words is "one hundred thirty-eight million, one hundred seventy-two thousand, three hundred seventy".