138184930 has 24 divisors (see below), whose sum is σ = 268126236. Its totient is φ = 50972640.

The previous prime is 138184919. The next prime is 138184931. The reversal of 138184930 is 39481831.

It can be written as a sum of positive squares in 2 ways, for example, as 128618281 + 9566649 = 11341^2 + 3093^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138184930.

It is not an unprimeable number, because it can be changed into a prime (138184931) by changing a digit.

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, 133515 + ... + 134545.

Almost surely, 2^138184930 is an apocalyptic number.

138184930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138184930 is a deficient number, since it is larger than the sum of its proper divisors (129941306).

138184930 is an equidigital number, since it uses as much as digits as its factorization.

138184930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 138184930 is about 11755.2086327721. The cubic root of 138184930 is about 516.9956563504.

The spelling of 138184930 in words is "one hundred thirty-eight million, one hundred eighty-four thousand, nine hundred thirty".