128877957 has 12 divisors (see below), whose sum is σ = 200477004. Its totient is φ = 79309440.

The previous prime is 128877941. The next prime is 128877961. The reversal of 128877957 is 759778821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38266596 + 90611361 = 6186^2 + 9519^2 .

It is not a de Polignac number, because 128877957 - 2⁴ = 128877941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128877977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550644 + ... + 550877.

It is an arithmetic number, because the mean of its divisors is an integer number (16706417).

Almost surely, 2^128877957 is an apocalyptic number.

It is an amenable number.

128877957 is a deficient number, since it is larger than the sum of its proper divisors (71599047).

128877957 is a wasteful number, since it uses less digits than its factorization.

128877957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101540 (or 1101537 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 54.

The square root of 128877957 is about 11352.4427767772. The cubic root of 128877957 is about 505.1180418763.

The spelling of 128877957 in words is "one hundred twenty-eight million, eight hundred seventy-seven thousand, nine hundred fifty-seven".