138915652 has 6 divisors (see below), whose sum is σ = 243102398. Its totient is φ = 69457824.

The previous prime is 138915617. The next prime is 138915697. The reversal of 138915652 is 256519831.

It can be written as a sum of positive squares in only one way, i.e., 112021056 + 26894596 = 10584^2 + 5186^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17364453 + ... + 17364460.

Almost surely, 2^138915652 is an apocalyptic number.

It is an amenable number.

138915652 is a deficient number, since it is larger than the sum of its proper divisors (104186746).

138915652 is a wasteful number, since it uses less digits than its factorization.

138915652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34728917 (or 34728915 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 138915652 is about 11786.2484277229. The cubic root of 138915652 is about 517.9053458728.

The spelling of 138915652 in words is "one hundred thirty-eight million, nine hundred fifteen thousand, six hundred fifty-two".