128887583 has 16 divisors (see below), whose sum is σ = 151165440. Its totient is φ = 108633600.

The previous prime is 128887579. The next prime is 128887609. The reversal of 128887583 is 385788821.

It is a cyclic number.

It is not a de Polignac number, because 128887583 - 2² = 128887579 is a prime.

It is a super-2 number, since 2×128887583² = 33224018103163778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128887783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3263 + ... + 16383.

It is an arithmetic number, because the mean of its divisors is an integer number (9447840).

Almost surely, 2^128887583 is an apocalyptic number.

128887583 is a deficient number, since it is larger than the sum of its proper divisors (22277857).

128887583 is a wasteful number, since it uses less digits than its factorization.

128887583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13198.

The product of its digits is 860160, while the sum is 50.

The square root of 128887583 is about 11352.8667304783. The cubic root of 128887583 is about 505.1306174564.

The spelling of 128887583 in words is "one hundred twenty-eight million, eight hundred eighty-seven thousand, five hundred eighty-three".