138528856 has 32 divisors (see below), whose sum is σ = 267688800. Its totient is φ = 67175680.

The previous prime is 138528833. The next prime is 138528877. The reversal of 138528856 is 658825831.

It is a congruent number.

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, 35901 + ... + 39571.

It is an arithmetic number, because the mean of its divisors is an integer number (8365275).

Almost surely, 2^138528856 is an apocalyptic number.

It is an amenable number.

138528856 is a deficient number, since it is larger than the sum of its proper divisors (129159944).

138528856 is a wasteful number, since it uses less digits than its factorization.

138528856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819 (or 3815 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The square root of 138528856 is about 11769.8282060530. The cubic root of 138528856 is about 517.4242147495.

The spelling of 138528856 in words is "one hundred thirty-eight million, five hundred twenty-eight thousand, eight hundred fifty-six".