204290649 has 12 divisors (see below), whose sum is σ = 312444756. Its totient is φ = 128182272.

The previous prime is 204290617. The next prime is 204290687. The reversal of 204290649 is 946092402.

204290649 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 9 + 0 + 649 = 666.

204290649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 140849424 + 63441225 = 11868^2 + 7965^2 .

It is not a de Polignac number, because 204290649 - 2⁵ = 204290617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204290609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 667464 + ... + 667769.

It is an arithmetic number, because the mean of its divisors is an integer number (26037063).

Almost surely, 2^204290649 is an apocalyptic number.

It is an amenable number.

204290649 is a deficient number, since it is larger than the sum of its proper divisors (108154107).

204290649 is a wasteful number, since it uses less digits than its factorization.

204290649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335256 (or 1335253 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 204290649 is about 14293.0279856999. The cubic root of 204290649 is about 588.9559713160.

The spelling of 204290649 in words is "two hundred four million, two hundred ninety thousand, six hundred forty-nine".