128563626 has 8 divisors (see below), whose sum is σ = 257127264. Its totient is φ = 42854540.

The previous prime is 128563613. The next prime is 128563627. The reversal of 128563626 is 626365821.

It is a sphenic number, since it is the product of 3 distinct primes.

128563626 is an admirable number.

It is a super-3 number, since 3×128563626³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (128563627) 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, 10713630 + ... + 10713641.

It is an arithmetic number, because the mean of its divisors is an integer number (32140908).

Almost surely, 2^128563626 is an apocalyptic number.

128563626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128563626 is a wasteful number, since it uses less digits than its factorization.

128563626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21427276.

The product of its digits is 103680, while the sum is 39.

The square root of 128563626 is about 11338.5901239969. The cubic root of 128563626 is about 504.7070496461.

The spelling of 128563626 in words is "one hundred twenty-eight million, five hundred sixty-three thousand, six hundred twenty-six".