2900865 has 16 divisors (see below), whose sum is σ = 5063616. Its totient is φ = 1406400.

The previous prime is 2900857. The next prime is 2900869. The reversal of 2900865 is 5680092.

It is not a de Polignac number, because 2900865 - 2³ = 2900857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2900869) 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, 8626 + ... + 8955.

It is an arithmetic number, because the mean of its divisors is an integer number (316476).

2^2900865 is an apocalyptic number.

It is an amenable number.

2900865 is a deficient number, since it is larger than the sum of its proper divisors (2162751).

2900865 is a wasteful number, since it uses less digits than its factorization.

2900865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17600.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 2900865 is about 1703.1925904019. The cubic root of 2900865 is about 142.6184917797.

The spelling of 2900865 in words is "two million, nine hundred thousand, eight hundred sixty-five".