138791092 has 48 divisors (see below), whose sum is σ = 276595200. Its totient is φ = 60364800.

The previous prime is 138791089. The next prime is 138791099. The reversal of 138791092 is 290197831.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138791099) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 131784 + ... + 132832.

It is an arithmetic number, because the mean of its divisors is an integer number (5762400).

Almost surely, 2^138791092 is an apocalyptic number.

It is an amenable number.

138791092 is a deficient number, since it is larger than the sum of its proper divisors (137804108).

138791092 is a wasteful number, since it uses less digits than its factorization.

138791092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 138791092 is about 11780.9631185230. The cubic root of 138791092 is about 517.7505047161.

The spelling of 138791092 in words is "one hundred thirty-eight million, seven hundred ninety-one thousand, ninety-two".