138915702 has 16 divisors (see below), whose sum is σ = 308701680. Its totient is φ = 46305216.

The previous prime is 138915701. The next prime is 138915709. The reversal of 138915702 is 207519831.

138915702 is a `hidden beast` number, since 1 + 3 + 89 + 1 + 570 + 2 = 666.

It is a Smith number, since the sum of its digits (36) 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 (138915701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286203 + ... + 1286310.

It is an arithmetic number, because the mean of its divisors is an integer number (19293855).

Almost surely, 2^138915702 is an apocalyptic number.

138915702 is an abundant number, since it is smaller than the sum of its proper divisors (169785978).

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

138915702 is a wasteful number, since it uses less digits than its factorization.

138915702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572524 (or 2572518 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 138915702 is about 11786.2505488387. The cubic root of 138915702 is about 517.9054080095.

The spelling of 138915702 in words is "one hundred thirty-eight million, nine hundred fifteen thousand, seven hundred two".