128850957 has 6 divisors (see below), whose sum is σ = 186118062. Its totient is φ = 85900632.

The previous prime is 128850949. The next prime is 128850959. The reversal of 128850957 is 759058821.

It is a happy number.

128850957 is a `hidden beast` number, since 12 + 88 + 509 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 111386916 + 17464041 = 10554^2 + 4179^2 .

It is not a de Polignac number, because 128850957 - 2³ = 128850949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128850959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7158378 + ... + 7158395.

It is an arithmetic number, because the mean of its divisors is an integer number (31019677).

Almost surely, 2^128850957 is an apocalyptic number.

It is an amenable number.

128850957 is a deficient number, since it is larger than the sum of its proper divisors (57267105).

128850957 is a wasteful number, since it uses less digits than its factorization.

128850957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14316779 (or 14316776 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 128850957 is about 11351.2535431114. The cubic root of 128850957 is about 505.0827652473.

The spelling of 128850957 in words is "one hundred twenty-eight million, eight hundred fifty thousand, nine hundred fifty-seven".