204128870 has 32 divisors (see below), whose sum is σ = 401824800. Its totient is φ = 74045440.

The previous prime is 204128861. The next prime is 204128879. The reversal of 204128870 is 78821402.

It is an interprime number because it is at equal distance from previous prime (204128861) and next prime (204128879).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204128879) 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, 47324 + ... + 51456.

It is an arithmetic number, because the mean of its divisors is an integer number (12557025).

Almost surely, 2^204128870 is an apocalyptic number.

204128870 is a deficient number, since it is larger than the sum of its proper divisors (197695930).

204128870 is a wasteful number, since it uses less digits than its factorization.

204128870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 204128870 is about 14287.3674971984. The cubic root of 204128870 is about 588.8004643283.

The spelling of 204128870 in words is "two hundred four million, one hundred twenty-eight thousand, eight hundred seventy".