138865130 has 16 divisors (see below), whose sum is σ = 250114824. Its totient is φ = 55511040.

The previous prime is 138865127. The next prime is 138865171. The reversal of 138865130 is 31568831.

138865130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 64336441 + 74528689 = 8021^2 + 8633^2 .

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, 17474 + ... + 24146.

Almost surely, 2^138865130 is an apocalyptic number.

138865130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138865130 is a deficient number, since it is larger than the sum of its proper divisors (111249694).

138865130 is a wasteful number, since it uses less digits than its factorization.

138865130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8761.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 138865130 is about 11784.1049723770. The cubic root of 138865130 is about 517.8425528849.

The spelling of 138865130 in words is "one hundred thirty-eight million, eight hundred sixty-five thousand, one hundred thirty".