138380052 has 36 divisors (see below), whose sum is σ = 337551200. Its totient is φ = 44119152.

The previous prime is 138380027. The next prime is 138380069. The reversal of 138380052 is 250083831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4552 + ... + 17247.

Almost surely, 2^138380052 is an apocalyptic number.

138380052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138380052 is an abundant number, since it is smaller than the sum of its proper divisors (199171148).

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

138380052 is a wasteful number, since it uses less digits than its factorization.

138380052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21852 (or 21827 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 138380052 is about 11763.5050898956. The cubic root of 138380052 is about 517.2388806126.

The spelling of 138380052 in words is "one hundred thirty-eight million, three hundred eighty thousand, fifty-two".