128880633 has 24 divisors (see below), whose sum is σ = 202163040. Its totient is φ = 72811200.

The previous prime is 128880613. The next prime is 128880643. The reversal of 128880633 is 336088821.

It is not a de Polignac number, because 128880633 - 2⁹ = 128880121 is a prime.

It is a super-2 number, since 2×128880633² = 33220435124961378, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128880591 and 128880600.

It is not an unprimeable number, because it can be changed into a prime (128880613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8158 + ... + 18008.

It is an arithmetic number, because the mean of its divisors is an integer number (8423460).

Almost surely, 2^128880633 is an apocalyptic number.

It is an amenable number.

128880633 is a deficient number, since it is larger than the sum of its proper divisors (73282407).

128880633 is an equidigital number, since it uses as much as digits as its factorization.

128880633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9957 (or 9950 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 128880633 is about 11352.5606362618. The cubic root of 128880633 is about 505.1215379138.

The spelling of 128880633 in words is "one hundred twenty-eight million, eight hundred eighty thousand, six hundred thirty-three".