128824685 has 16 divisors (see below), whose sum is σ = 174085632. Its totient is φ = 90667200.

The previous prime is 128824681. The next prime is 128824687. The reversal of 128824685 is 586428821.

It is not a de Polignac number, because 128824685 - 2² = 128824681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128824681) 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, 36074 + ... + 39483.

It is an arithmetic number, because the mean of its divisors is an integer number (10880352).

Almost surely, 2^128824685 is an apocalyptic number.

It is an amenable number.

128824685 is a deficient number, since it is larger than the sum of its proper divisors (45260947).

128824685 is a wasteful number, since it uses less digits than its factorization.

128824685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75604.

The product of its digits is 245760, while the sum is 44.

The square root of 128824685 is about 11350.0962550985. The cubic root of 128824685 is about 505.0484350499.

The spelling of 128824685 in words is "one hundred twenty-eight million, eight hundred twenty-four thousand, six hundred eighty-five".