138251792 has 20 divisors (see below), whose sum is σ = 306129216. Its totient is φ = 59250720.

The previous prime is 138251783. The next prime is 138251801. The reversal of 138251792 is 297152831.

It is an interprime number because it is at equal distance from previous prime (138251783) and next prime (138251801).

It is a super-2 number, since 2×138251792² = 38227115982422528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617084 + ... + 617307.

Almost surely, 2^138251792 is an apocalyptic number.

It is an amenable number.

138251792 is an abundant number, since it is smaller than the sum of its proper divisors (167877424).

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

138251792 is a wasteful number, since it uses less digits than its factorization.

138251792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234406 (or 1234400 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 138251792 is about 11758.0522196493. The cubic root of 138251792 is about 517.0790272116.

The spelling of 138251792 in words is "one hundred thirty-eight million, two hundred fifty-one thousand, seven hundred ninety-two".