138849792 has 40 divisors (see below), whose sum is σ = 369908616. Its totient is φ = 46282752.

The previous prime is 138849773. The next prime is 138849793. The reversal of 138849792 is 297948831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138849793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43663 + ... + 46734.

Almost surely, 2^138849792 is an apocalyptic number.

138849792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138849792 is an abundant number, since it is smaller than the sum of its proper divisors (231058824).

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

138849792 is an frugal number, since it uses more digits than its factorization.

138849792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90418 (or 90402 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 138849792 is about 11783.4541625111. The cubic root of 138849792 is about 517.8234865157.

The spelling of 138849792 in words is "one hundred thirty-eight million, eight hundred forty-nine thousand, seven hundred ninety-two".