128888131 has 4 divisors (see below), whose sum is σ = 132371632. Its totient is φ = 125404632.

The previous prime is 128888119. The next prime is 128888183. The reversal of 128888131 is 131888821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128888131 - 2⁵ = 128888099 is a prime.

It is a super-2 number, since 2×128888131² = 33224300625346322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128828131) 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, 1741695 + ... + 1741768.

It is an arithmetic number, because the mean of its divisors is an integer number (33092908).

Almost surely, 2^128888131 is an apocalyptic number.

128888131 is a deficient number, since it is larger than the sum of its proper divisors (3483501).

128888131 is an equidigital number, since it uses as much as digits as its factorization.

128888131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483500.

The product of its digits is 24576, while the sum is 40.

The square root of 128888131 is about 11352.8908653259. The cubic root of 128888131 is about 505.1313333547.

The spelling of 128888131 in words is "one hundred twenty-eight million, eight hundred eighty-eight thousand, one hundred thirty-one".