138880868 has 24 divisors (see below), whose sum is σ = 286723584. Its totient is φ = 57600000.

The previous prime is 138880849. The next prime is 138880879. The reversal of 138880868 is 868088831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79133 + ... + 80868.

It is an arithmetic number, because the mean of its divisors is an integer number (11946816).

Almost surely, 2^138880868 is an apocalyptic number.

It is an amenable number.

138880868 is an abundant number, since it is smaller than the sum of its proper divisors (147842716).

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

138880868 is a wasteful number, since it uses less digits than its factorization.

138880868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160043 (or 160041 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 50.

The square root of 138880868 is about 11784.7727173671. The cubic root of 138880868 is about 517.8621150271.

The spelling of 138880868 in words is "one hundred thirty-eight million, eight hundred eighty thousand, eight hundred sixty-eight".