138807652 has 24 divisors (see below), whose sum is σ = 261049824. Its totient is φ = 64344192.

The previous prime is 138807649. The next prime is 138807671. The reversal of 138807652 is 256708831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10678 + ... + 19789.

It is an arithmetic number, because the mean of its divisors is an integer number (10877076).

Almost surely, 2^138807652 is an apocalyptic number.

It is an amenable number.

138807652 is a deficient number, since it is larger than the sum of its proper divisors (122242172).

138807652 is a wasteful number, since it uses less digits than its factorization.

138807652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30555 (or 30553 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 138807652 is about 11781.6659263451. The cubic root of 138807652 is about 517.7710958728.

The spelling of 138807652 in words is "one hundred thirty-eight million, eight hundred seven thousand, six hundred fifty-two".