138900958 has 16 divisors (see below), whose sum is σ = 238376160. Its totient is φ = 59463936.

The previous prime is 138900947. The next prime is 138900961. The reversal of 138900958 is 859009831.

It is a super-2 number, since 2×138900958² = 38586952266635528, which contains 22 as substring.

It is a congruent number.

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, 9210 + ... + 19042.

It is an arithmetic number, because the mean of its divisors is an integer number (14898510).

Almost surely, 2^138900958 is an apocalyptic number.

138900958 is a deficient number, since it is larger than the sum of its proper divisors (99475202).

138900958 is a wasteful number, since it uses less digits than its factorization.

138900958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 138900958 is about 11785.6250576709. The cubic root of 138900958 is about 517.8870845049.

The spelling of 138900958 in words is "one hundred thirty-eight million, nine hundred thousand, nine hundred fifty-eight".