138589392 has 20 divisors (see below), whose sum is σ = 358022720. Its totient is φ = 46196448.

The previous prime is 138589361. The next prime is 138589427. The reversal of 138589392 is 293985831.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 2887279 = 138589392 / (1 + 3 + 8 + 5 + 8 + 9 + 3 + 9 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443592 + ... + 1443687.

It is an arithmetic number, because the mean of its divisors is an integer number (17901136).

Almost surely, 2^138589392 is an apocalyptic number.

138589392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138589392 is an abundant number, since it is smaller than the sum of its proper divisors (219433328).

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

138589392 is a wasteful number, since it uses less digits than its factorization.

138589392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887290 (or 2887284 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 138589392 is about 11772.3995854711. The cubic root of 138589392 is about 517.4995738520.

The spelling of 138589392 in words is "one hundred thirty-eight million, five hundred eighty-nine thousand, three hundred ninety-two".