138725880 has 64 divisors (see below), whose sum is σ = 434280960. Its totient is φ = 35384448.

The previous prime is 138725843. The next prime is 138725887. The reversal of 138725880 is 88527831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138725887) 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, 22372 + ... + 27891.

It is an arithmetic number, because the mean of its divisors is an integer number (6785640).

Almost surely, 2^138725880 is an apocalyptic number.

138725880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138725880 is an abundant number, since it is smaller than the sum of its proper divisors (295555080).

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

138725880 is a wasteful number, since it uses less digits than its factorization.

138725880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50300 (or 50296 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 138725880 is about 11778.1951079102. The cubic root of 138725880 is about 517.6694024041.

The spelling of 138725880 in words is "one hundred thirty-eight million, seven hundred twenty-five thousand, eight hundred eighty".