138233650 has 48 divisors (see below), whose sum is σ = 268339968. Its totient is φ = 52920000.

The previous prime is 138233629. The next prime is 138233651. The reversal of 138233650 is 56332831.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (138233651) 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, 156109 + ... + 156991.

It is an arithmetic number, because the mean of its divisors is an integer number (5590416).

Almost surely, 2^138233650 is an apocalyptic number.

138233650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138233650 is a deficient number, since it is larger than the sum of its proper divisors (130106318).

138233650 is a wasteful number, since it uses less digits than its factorization.

138233650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 138233650 is about 11757.2807230244. The cubic root of 138233650 is about 517.0564084377.

The spelling of 138233650 in words is "one hundred thirty-eight million, two hundred thirty-three thousand, six hundred fifty".