138394792 has 8 divisors (see below), whose sum is σ = 259490250. Its totient is φ = 69197392.

The previous prime is 138394771. The next prime is 138394799. The reversal of 138394792 is 297493831.

138394792 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 97101316 + 41293476 = 9854^2 + 6426^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138394799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8649667 + ... + 8649682.

Almost surely, 2^138394792 is an apocalyptic number.

It is an amenable number.

138394792 is a deficient number, since it is larger than the sum of its proper divisors (121095458).

138394792 is a wasteful number, since it uses less digits than its factorization.

138394792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17299355 (or 17299351 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 138394792 is about 11764.1315871593. The cubic root of 138394792 is about 517.2572450862.

The spelling of 138394792 in words is "one hundred thirty-eight million, three hundred ninety-four thousand, seven hundred ninety-two".