138123800 has 48 divisors (see below), whose sum is σ = 322010640. Its totient is φ = 55099520.

The previous prime is 138123761. The next prime is 138123823. The reversal of 138123800 is 8321831.

It is a self number, because there is not a number n which added to its sum of digits gives 138123800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99914 + ... + 101286.

It is an arithmetic number, because the mean of its divisors is an integer number (6708555).

Almost surely, 2^138123800 is an apocalyptic number.

138123800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138123800 is an abundant number, since it is smaller than the sum of its proper divisors (183886840).

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

138123800 is a wasteful number, since it uses less digits than its factorization.

138123800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892 (or 1883 counting only the distinct ones).

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

The square root of 138123800 is about 11752.6082211567. The cubic root of 138123800 is about 516.9194092374.

The spelling of 138123800 in words is "one hundred thirty-eight million, one hundred twenty-three thousand, eight hundred".