138207570 has 32 divisors (see below), whose sum is σ = 337960512. Its totient is φ = 36159552.

The previous prime is 138207541. The next prime is 138207599. The reversal of 138207570 is 75702831.

It is an interprime number because it is at equal distance from previous prime (138207541) and next prime (138207599).

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, 41872 + ... + 45051.

It is an arithmetic number, because the mean of its divisors is an integer number (10561266).

Almost surely, 2^138207570 is an apocalyptic number.

138207570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138207570 is an abundant number, since it is smaller than the sum of its proper divisors (199752942).

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

138207570 is a wasteful number, since it uses less digits than its factorization.

138207570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86986.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 138207570 is about 11756.1715707113. The cubic root of 138207570 is about 517.0238893917.

The spelling of 138207570 in words is "one hundred thirty-eight million, two hundred seven thousand, five hundred seventy".