128856568 has 16 divisors (see below), whose sum is σ = 246165480. Its totient is φ = 63212448.

The previous prime is 128856547. The next prime is 128856577. The reversal of 128856568 is 865658821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151530 + ... + 152377.

Almost surely, 2^128856568 is an apocalyptic number.

It is an amenable number.

128856568 is a deficient number, since it is larger than the sum of its proper divisors (117308912).

128856568 is a wasteful number, since it uses less digits than its factorization.

128856568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303966 (or 303962 counting only the distinct ones).

The product of its digits is 921600, while the sum is 49.

The square root of 128856568 is about 11351.5006937409. The cubic root of 128856568 is about 505.0900966590.

The spelling of 128856568 in words is "one hundred twenty-eight million, eight hundred fifty-six thousand, five hundred sixty-eight".