138004236 has 30 divisors (see below), whose sum is σ = 360771180. Its totient is φ = 46001304.

The previous prime is 138004159. The next prime is 138004259. The reversal of 138004236 is 632400831.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 212646 + ... + 213293.

It is an arithmetic number, because the mean of its divisors is an integer number (12025706).

Almost surely, 2^138004236 is an apocalyptic number.

It is an amenable number.

138004236 is an abundant number, since it is smaller than the sum of its proper divisors (222766944).

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

138004236 is a wasteful number, since it uses less digits than its factorization.

138004236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425955 (or 425944 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 138004236 is about 11747.5204192204. The cubic root of 138004236 is about 516.7702126611.

The spelling of 138004236 in words is "one hundred thirty-eight million, four thousand, two hundred thirty-six".