138837650 has 24 divisors (see below), whose sum is σ = 295129920. Its totient is φ = 47601360.

The previous prime is 138837641. The next prime is 138837659. The reversal of 138837650 is 56738831.

It is an interprime number because it is at equal distance from previous prime (138837641) and next prime (138837659).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138837598 and 138837607.

It is not an unprimeable number, because it can be changed into a prime (138837659) 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 11 ways as a sum of consecutive naturals, for example, 197990 + ... + 198689.

It is an arithmetic number, because the mean of its divisors is an integer number (12297080).

Almost surely, 2^138837650 is an apocalyptic number.

138837650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138837650 is an abundant number, since it is smaller than the sum of its proper divisors (156292270).

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

138837650 is a wasteful number, since it uses less digits than its factorization.

138837650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396698 (or 396693 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 138837650 is about 11782.9389372940. The cubic root of 138837650 is about 517.8083920361.

The spelling of 138837650 in words is "one hundred thirty-eight million, eight hundred thirty-seven thousand, six hundred fifty".