128917296 has 60 divisors (see below), whose sum is σ = 373242480. Its totient is φ = 41489280.

The previous prime is 128917291. The next prime is 128917303. The reversal of 128917296 is 692719821.

It is not an unprimeable number, because it can be changed into a prime (128917291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11260 + ... + 19611.

It is an arithmetic number, because the mean of its divisors is an integer number (6220708).

Almost surely, 2^128917296 is an apocalyptic number.

128917296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128917296 is an abundant number, since it is smaller than the sum of its proper divisors (244325184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128917296 is a wasteful number, since it uses less digits than its factorization.

128917296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30914 (or 30905 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 128917296 is about 11354.1752672750. The cubic root of 128917296 is about 505.1694311070.

The spelling of 128917296 in words is "one hundred twenty-eight million, nine hundred seventeen thousand, two hundred ninety-six".