138043664 has 40 divisors (see below), whose sum is σ = 307138080. Its totient is φ = 59443200.

The previous prime is 138043637. The next prime is 138043687. The reversal of 138043664 is 466340831.

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, 17297 + ... + 23984.

It is an arithmetic number, because the mean of its divisors is an integer number (7678452).

Almost surely, 2^138043664 is an apocalyptic number.

It is an amenable number.

138043664 is an abundant number, since it is smaller than the sum of its proper divisors (169094416).

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

138043664 is a wasteful number, since it uses less digits than its factorization.

138043664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41319 (or 41313 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 138043664 is about 11749.1984407448. The cubic root of 138043664 is about 516.8194219618.

The spelling of 138043664 in words is "one hundred thirty-eight million, forty-three thousand, six hundred sixty-four".