128996325 has 18 divisors (see below), whose sum is σ = 231047154. Its totient is φ = 68797920.

The previous prime is 128996299. The next prime is 128996369. The reversal of 128996325 is 523699821.

128996325 is a `hidden beast` number, since 1 + 2 + 8 + 9 + 9 + 632 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 5919489 + 123076836 = 2433^2 + 11094^2 .

It is not a de Polignac number, because 128996325 - 2⁵ = 128996293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 286434 + ... + 286883.

It is an arithmetic number, because the mean of its divisors is an integer number (12835953).

Almost surely, 2^128996325 is an apocalyptic number.

128996325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128996325 is a deficient number, since it is larger than the sum of its proper divisors (102050829).

128996325 is a wasteful number, since it uses less digits than its factorization.

128996325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573333 (or 573325 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 128996325 is about 11357.6549075943. The cubic root of 128996325 is about 505.2726364981.

The spelling of 128996325 in words is "one hundred twenty-eight million, nine hundred ninety-six thousand, three hundred twenty-five".