138785964 has 24 divisors (see below), whose sum is σ = 332587248. Its totient is φ = 45011520.

The previous prime is 138785957. The next prime is 138785993. The reversal of 138785964 is 469587831.

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, 155847 + ... + 156734.

It is an arithmetic number, because the mean of its divisors is an integer number (13857802).

Almost surely, 2^138785964 is an apocalyptic number.

It is an amenable number.

138785964 is an abundant number, since it is smaller than the sum of its proper divisors (193801284).

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

138785964 is a wasteful number, since it uses less digits than its factorization.

138785964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312625 (or 312623 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 138785964 is about 11780.7454772608. The cubic root of 138785964 is about 517.7441280885.

The spelling of 138785964 in words is "one hundred thirty-eight million, seven hundred eighty-five thousand, nine hundred sixty-four".