8128904 has 48 divisors (see below), whose sum is σ = 18006300. Its totient is φ = 3429888.

The previous prime is 8128877. The next prime is 8128919. The reversal of 8128904 is 4098218.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7300804 + 828100 = 2702^2 + 910^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34772 + ... + 35004.

Almost surely, 2^8128904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8128904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9003150).

8128904 is an abundant number, since it is smaller than the sum of its proper divisors (9877396).

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

8128904 is a wasteful number, since it uses less digits than its factorization.

8128904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 8128904 is about 2851.1232874080. The cubic root of 8128904 is about 201.0684815704.

The spelling of 8128904 in words is "eight million, one hundred twenty-eight thousand, nine hundred four".