138804156 has 36 divisors (see below), whose sum is σ = 352001832. Its totient is φ = 46118304.

The previous prime is 138804151. The next prime is 138804157. The reversal of 138804156 is 651408831.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 138804156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138804151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5331 + ... + 17493.

Almost surely, 2^138804156 is an apocalyptic number.

It is an amenable number.

138804156 is an abundant number, since it is smaller than the sum of its proper divisors (213197676).

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

138804156 is a wasteful number, since it uses less digits than its factorization.

138804156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12490 (or 12485 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 138804156 is about 11781.5175592960. The cubic root of 138804156 is about 517.7667489872.

The spelling of 138804156 in words is "one hundred thirty-eight million, eight hundred four thousand, one hundred fifty-six".