138352864 has 36 divisors (see below), whose sum is σ = 294957936. Its totient is φ = 63852672.

The previous prime is 138352861. The next prime is 138352871. The reversal of 138352864 is 468253831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138352861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7384 + ... + 18199.

It is an arithmetic number, because the mean of its divisors is an integer number (8193276).

Almost surely, 2^138352864 is an apocalyptic number.

It is an amenable number.

138352864 is an abundant number, since it is smaller than the sum of its proper divisors (156605072).

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

138352864 is a wasteful number, since it uses less digits than its factorization.

138352864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25619 (or 25598 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 138352864 is about 11762.3494251786. The cubic root of 138352864 is about 517.2050038325.

The spelling of 138352864 in words is "one hundred thirty-eight million, three hundred fifty-two thousand, eight hundred sixty-four".