128275904 has 28 divisors (see below), whose sum is σ = 257184144. Its totient is φ = 63473664.

The previous prime is 128275879. The next prime is 128275933. The reversal of 128275904 is 409572821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4124 + ... + 16539.

It is an arithmetic number, because the mean of its divisors is an integer number (9185148).

Almost surely, 2^128275904 is an apocalyptic number.

It is an amenable number.

128275904 is an abundant number, since it is smaller than the sum of its proper divisors (128908240).

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

128275904 is an equidigital number, since it uses as much as digits as its factorization.

128275904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20772 (or 20762 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 128275904 is about 11325.8952847005. The cubic root of 128275904 is about 504.3302614090.

The spelling of 128275904 in words is "one hundred twenty-eight million, two hundred seventy-five thousand, nine hundred four".