204890637 has 16 divisors (see below), whose sum is σ = 313528320. Its totient is φ = 116587632.

The previous prime is 204890629. The next prime is 204890659. The reversal of 204890637 is 736098402.

It is not a de Polignac number, because 204890637 - 2³ = 204890629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204890595 and 204890604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204890617) 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, 15393 + ... + 25430.

It is an arithmetic number, because the mean of its divisors is an integer number (19595520).

Almost surely, 2^204890637 is an apocalyptic number.

It is an amenable number.

204890637 is a deficient number, since it is larger than the sum of its proper divisors (108637683).

204890637 is a wasteful number, since it uses less digits than its factorization.

204890637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41072.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 204890637 is about 14314.0014321642. The cubic root of 204890637 is about 589.5319825732.

The spelling of 204890637 in words is "two hundred four million, eight hundred ninety thousand, six hundred thirty-seven".