138752764 has 6 divisors (see below), whose sum is σ = 242817344. Its totient is φ = 69376380.

The previous prime is 138752753. The next prime is 138752771. The reversal of 138752764 is 467257831.

It is a self number, because there is not a number n which added to its sum of digits gives 138752764.

It is a congruent number.

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, 17344092 + ... + 17344099.

Almost surely, 2^138752764 is an apocalyptic number.

It is an amenable number.

138752764 is a deficient number, since it is larger than the sum of its proper divisors (104064580).

138752764 is a wasteful number, since it uses less digits than its factorization.

138752764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34688195 (or 34688193 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 138752764 is about 11779.3363140713. The cubic root of 138752764 is about 517.7028403498.

The spelling of 138752764 in words is "one hundred thirty-eight million, seven hundred fifty-two thousand, seven hundred sixty-four".