138722604 has 24 divisors (see below), whose sum is σ = 323904000. Its totient is φ = 46209744.

The previous prime is 138722599. The next prime is 138722627. The reversal of 138722604 is 406227831.

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, 21097 + ... + 26879.

It is an arithmetic number, because the mean of its divisors is an integer number (13496000).

Almost surely, 2^138722604 is an apocalyptic number.

It is an amenable number.

138722604 is an abundant number, since it is smaller than the sum of its proper divisors (185181396).

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

138722604 is a wasteful number, since it uses less digits than its factorization.

138722604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7789 (or 7787 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 138722604 is about 11778.0560365452. The cubic root of 138722604 is about 517.6653274656.

The spelling of 138722604 in words is "one hundred thirty-eight million, seven hundred twenty-two thousand, six hundred four".