128520804 has 24 divisors (see below), whose sum is σ = 300172320. Its totient is φ = 42798784.

The previous prime is 128520797. The next prime is 128520809. The reversal of 128520804 is 408025821.

It is not an unprimeable number, because it can be changed into a prime (128520809) 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, 9352 + ... + 18560.

It is an arithmetic number, because the mean of its divisors is an integer number (12507180).

Almost surely, 2^128520804 is an apocalyptic number.

It is an amenable number.

128520804 is an abundant number, since it is smaller than the sum of its proper divisors (171651516).

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

128520804 is a wasteful number, since it uses less digits than its factorization.

128520804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10379 (or 10377 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 128520804 is about 11336.7016367196. The cubic root of 128520804 is about 504.6510074462.

The spelling of 128520804 in words is "one hundred twenty-eight million, five hundred twenty thousand, eight hundred four".