138900870 has 48 divisors (see below), whose sum is σ = 361726560. Its totient is φ = 36980352.

The previous prime is 138900869. The next prime is 138900871. The reversal of 138900870 is 78009831.

It is an interprime number because it is at equal distance from previous prime (138900869) and next prime (138900871).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138900871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100927 + ... + 102293.

It is an arithmetic number, because the mean of its divisors is an integer number (7535970).

Almost surely, 2^138900870 is an apocalyptic number.

138900870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138900870 is an abundant number, since it is smaller than the sum of its proper divisors (222825690).

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

138900870 is a wasteful number, since it uses less digits than its factorization.

138900870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509 (or 2506 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 138900870 is about 11785.6213243087. The cubic root of 138900870 is about 517.8869751366.

The spelling of 138900870 in words is "one hundred thirty-eight million, nine hundred thousand, eight hundred seventy".