2865204612 has 18 divisors (see below), whose sum is σ = 7242600638. Its totient is φ = 955068192.

The previous prime is 2865204499. The next prime is 2865204673. The reversal of 2865204612 is 2164025682.

It is a happy number.

2865204612 is a `hidden beast` number, since 2 + 86 + 520 + 46 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1718434116 + 1146770496 = 41454^2 + 33864^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 79589017 = 2865204612 / (2 + 8 + 6 + 5 + 2 + 0 + 4 + 6 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39794473 + ... + 39794544.

Almost surely, 2^2865204612 is an apocalyptic number.

It is an amenable number.

2865204612 is an abundant number, since it is smaller than the sum of its proper divisors (4377396026).

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

2865204612 is a wasteful number, since it uses less digits than its factorization.

2865204612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79589027 (or 79589022 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 2865204612 is about 53527.6060738756. The cubic root of 2865204612 is about 1420.3167665998.

The spelling of 2865204612 in words is "two billion, eight hundred sixty-five million, two hundred four thousand, six hundred twelve".