128508896 has 24 divisors (see below), whose sum is σ = 254623320. Its totient is φ = 63842688.

The previous prime is 128508893. The next prime is 128508907. The reversal of 128508896 is 698805821.

It is a super-2 number, since 2×128508896² = 33029072702277632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128508896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128508893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7766 + ... + 17813.

It is an arithmetic number, because the mean of its divisors is an integer number (10609305).

Almost surely, 2^128508896 is an apocalyptic number.

128508896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128508896 is a deficient number, since it is larger than the sum of its proper divisors (126114424).

128508896 is a wasteful number, since it uses less digits than its factorization.

128508896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25746 (or 25738 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 128508896 is about 11336.1764277026. The cubic root of 128508896 is about 504.6354209429.

The spelling of 128508896 in words is "one hundred twenty-eight million, five hundred eight thousand, eight hundred ninety-six".