128766957 has 16 divisors (see below), whose sum is σ = 187520832. Its totient is φ = 77947520.

The previous prime is 128766943. The next prime is 128766973. The reversal of 128766957 is 759667821.

It is a cyclic number.

It is not a de Polignac number, because 128766957 - 2⁶ = 128766893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128766907) 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, 34423 + ... + 37979.

It is an arithmetic number, because the mean of its divisors is an integer number (11720052).

Almost surely, 2^128766957 is an apocalyptic number.

It is an amenable number.

128766957 is a deficient number, since it is larger than the sum of its proper divisors (58753875).

128766957 is a wasteful number, since it uses less digits than its factorization.

128766957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668.

The product of its digits is 1270080, while the sum is 51.

The square root of 128766957 is about 11347.5529080062. The cubic root of 128766957 is about 504.9729842098.

The spelling of 128766957 in words is "one hundred twenty-eight million, seven hundred sixty-six thousand, nine hundred fifty-seven".