138641370 has 32 divisors (see below), whose sum is σ = 380274048. Its totient is φ = 31689408.

The previous prime is 138641369. The next prime is 138641383. The reversal of 138641370 is 73146831.

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, 329889 + ... + 330308.

It is an arithmetic number, because the mean of its divisors is an integer number (11883564).

Almost surely, 2^138641370 is an apocalyptic number.

138641370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138641370 is an abundant number, since it is smaller than the sum of its proper divisors (241632678).

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

138641370 is a wasteful number, since it uses less digits than its factorization.

138641370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660214.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 138641370 is about 11774.6069998111. The cubic root of 138641370 is about 517.5642618977.

The spelling of 138641370 in words is "one hundred thirty-eight million, six hundred forty-one thousand, three hundred seventy".