204888290 has 16 divisors (see below), whose sum is σ = 368961912. Its totient is φ = 81919104.

The previous prime is 204888289. The next prime is 204888337. The reversal of 204888290 is 92888402.

It can be written as a sum of positive squares in 4 ways, for example, as 136445761 + 68442529 = 11681^2 + 8273^2 .

It is a super-2 number, since 2×204888290² = 83958422758248200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42272 + ... + 46868.

Almost surely, 2^204888290 is an apocalyptic number.

204888290 is a deficient number, since it is larger than the sum of its proper divisors (164073622).

204888290 is a wasteful number, since it uses less digits than its factorization.

204888290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9061.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 204888290 is about 14313.9194492634. The cubic root of 204888290 is about 589.5297315563.

The spelling of 204888290 in words is "two hundred four million, eight hundred eighty-eight thousand, two hundred ninety".