128679828 has 24 divisors (see below), whose sum is σ = 300511680. Its totient is φ = 42856320.

The previous prime is 128679823. The next prime is 128679839. The reversal of 128679828 is 828976821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128679823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12393 + ... + 20271.

It is an arithmetic number, because the mean of its divisors is an integer number (12521320).

Almost surely, 2^128679828 is an apocalyptic number.

It is an amenable number.

128679828 is an abundant number, since it is smaller than the sum of its proper divisors (171831852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128679828 is a wasteful number, since it uses less digits than its factorization.

128679828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9247 (or 9245 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 128679828 is about 11343.7131487005. The cubic root of 128679828 is about 504.8590633731.

The spelling of 128679828 in words is "one hundred twenty-eight million, six hundred seventy-nine thousand, eight hundred twenty-eight".