138115500 has 48 divisors (see below), whose sum is σ = 402196704. Its totient is φ = 36830400.

The previous prime is 138115499. The next prime is 138115501. The reversal of 138115500 is 5511831.

It is an interprime number because it is at equal distance from previous prime (138115499) and next prime (138115501).

It is not an unprimeable number, because it can be changed into a prime (138115501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44539 + ... + 47538.

It is an arithmetic number, because the mean of its divisors is an integer number (8379098).

Almost surely, 2^138115500 is an apocalyptic number.

138115500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138115500 is an abundant number, since it is smaller than the sum of its proper divisors (264081204).

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

138115500 is a wasteful number, since it uses less digits than its factorization.

138115500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92099 (or 92087 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 138115500 is about 11752.2551027452. The cubic root of 138115500 is about 516.9090549585.

The spelling of 138115500 in words is "one hundred thirty-eight million, one hundred fifteen thousand, five hundred".