138875950 has 24 divisors (see below), whose sum is σ = 258978960. Its totient is φ = 55406400.

The previous prime is 138875927. The next prime is 138875963. The reversal of 138875950 is 59578831.

It is a self number, because there is not a number n which added to its sum of digits gives 138875950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17055 + ... + 23845.

It is an arithmetic number, because the mean of its divisors is an integer number (10790790).

Almost surely, 2^138875950 is an apocalyptic number.

138875950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138875950 is a deficient number, since it is larger than the sum of its proper divisors (120103010).

138875950 is a wasteful number, since it uses less digits than its factorization.

138875950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7212 (or 7207 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 138875950 is about 11784.5640564257. The cubic root of 138875950 is about 517.8560021718.

The spelling of 138875950 in words is "one hundred thirty-eight million, eight hundred seventy-five thousand, nine hundred fifty".