2045818 has 16 divisors (see below), whose sum is σ = 3202920. Its totient is φ = 979200.

The previous prime is 2045789. The next prime is 2045819. The reversal of 2045818 is 8185402.

It can be written as a sum of positive squares in 4 ways, for example, as 1129969 + 915849 = 1063^2 + 957^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2045819) 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, 4798 + ... + 5206.

2^2045818 is an apocalyptic number.

2045818 is a deficient number, since it is larger than the sum of its proper divisors (1157102).

2045818 is a wasteful number, since it uses less digits than its factorization.

2045818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 2045818 is about 1430.3209430055. The cubic root of 2045818 is about 126.9469677520.

The spelling of 2045818 in words is "two million, forty-five thousand, eight hundred eighteen".