138231800 has 48 divisors (see below), whose sum is σ = 367305360. Its totient is φ = 47393280.

The previous prime is 138231773. The next prime is 138231809. The reversal of 138231800 is 8132831.

It is a self number, because there is not a number n which added to its sum of digits gives 138231800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138231809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47969 + ... + 50768.

It is an arithmetic number, because the mean of its divisors is an integer number (7652195).

Almost surely, 2^138231800 is an apocalyptic number.

138231800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138231800 is an abundant number, since it is smaller than the sum of its proper divisors (229073560).

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

138231800 is a wasteful number, since it uses less digits than its factorization.

138231800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98760 (or 98751 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 138231800 is about 11757.2020481065. The cubic root of 138231800 is about 517.0541018150.

The spelling of 138231800 in words is "one hundred thirty-eight million, two hundred thirty-one thousand, eight hundred".