128815953 has 48 divisors (see below), whose sum is σ = 222765120. Its totient is φ = 65608704.

The previous prime is 128815937. The next prime is 128815963. The reversal of 128815953 is 359518821.

It is not a de Polignac number, because 128815953 - 2⁴ = 128815937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128815963) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46125 + ... + 48837.

It is an arithmetic number, because the mean of its divisors is an integer number (4640940).

Almost surely, 2^128815953 is an apocalyptic number.

It is an amenable number.

128815953 is a deficient number, since it is larger than the sum of its proper divisors (93949167).

128815953 is a wasteful number, since it uses less digits than its factorization.

128815953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766 (or 2759 counting only the distinct ones).

The product of its digits is 86400, while the sum is 42.

The square root of 128815953 is about 11349.7115822386. The cubic root of 128815953 is about 505.0370237209.

The spelling of 128815953 in words is "one hundred twenty-eight million, eight hundred fifteen thousand, nine hundred fifty-three".