128487957 has 16 divisors (see below), whose sum is σ = 187027008. Its totient is φ = 77984640.

The previous prime is 128487949. The next prime is 128487971. The reversal of 128487957 is 759784821.

It is not a de Polignac number, because 128487957 - 2³ = 128487949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128487257) 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, 19719 + ... + 25412.

It is an arithmetic number, because the mean of its divisors is an integer number (11689188).

Almost surely, 2^128487957 is an apocalyptic number.

It is an amenable number.

128487957 is a deficient number, since it is larger than the sum of its proper divisors (58539051).

128487957 is a wasteful number, since it uses less digits than its factorization.

128487957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45220.

The product of its digits is 1128960, while the sum is 51.

The square root of 128487957 is about 11335.2528423498. The cubic root of 128487957 is about 504.6080113358.

The spelling of 128487957 in words is "one hundred twenty-eight million, four hundred eighty-seven thousand, nine hundred fifty-seven".