2825865220 has 24 divisors (see below), whose sum is σ = 5935356504. Its totient is φ = 1130148096.

The previous prime is 2825865209. The next prime is 2825865247. The reversal of 2825865220 is 225685282.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 467597376 + 2358267844 = 21624^2 + 48562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170752 + ... + 186568.

It is an arithmetic number, because the mean of its divisors is an integer number (247306521).

Almost surely, 2^2825865220 is an apocalyptic number.

2825865220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2825865220 is an abundant number, since it is smaller than the sum of its proper divisors (3109491284).

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

2825865220 is a wasteful number, since it uses less digits than its factorization.

2825865220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24759 (or 24757 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 2825865220 is about 53158.8677456546. The cubic root of 2825865220 is about 1413.7864492673.

The spelling of 2825865220 in words is "two billion, eight hundred twenty-five million, eight hundred sixty-five thousand, two hundred twenty".