138900834 has 12 divisors (see below), whose sum is σ = 300951846. Its totient is φ = 46300272.

The previous prime is 138900833. The next prime is 138900851. The reversal of 138900834 is 438009831.

It can be written as a sum of positive squares in only one way, i.e., 116575209 + 22325625 = 10797^2 + 4725^2 .

It is not an unprimeable number, because it can be changed into a prime (138900833) 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 5 ways as a sum of consecutive naturals, for example, 3858339 + ... + 3858374.

Almost surely, 2^138900834 is an apocalyptic number.

138900834 is an abundant number, since it is smaller than the sum of its proper divisors (162051012).

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

138900834 is a wasteful number, since it uses less digits than its factorization.

138900834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7716721 (or 7716718 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 138900834 is about 11785.6197970238. The cubic root of 138900834 is about 517.8869303951.

The spelling of 138900834 in words is "one hundred thirty-eight million, nine hundred thousand, eight hundred thirty-four".