138392361 has 32 divisors (see below), whose sum is σ = 211200000. Its totient is φ = 89513424.

The previous prime is 138392351. The next prime is 138392363. The reversal of 138392361 is 163293831.

It is not a de Polignac number, because 138392361 - 2⁵ = 138392329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138392363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230740 + ... + 231338.

It is an arithmetic number, because the mean of its divisors is an integer number (6600000).

Almost surely, 2^138392361 is an apocalyptic number.

It is an amenable number.

138392361 is a deficient number, since it is larger than the sum of its proper divisors (72807639).

138392361 is a wasteful number, since it uses less digits than its factorization.

138392361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 844 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 138392361 is about 11764.0282641619. The cubic root of 138392361 is about 517.2542164083.

The spelling of 138392361 in words is "one hundred thirty-eight million, three hundred ninety-two thousand, three hundred sixty-one".