204702290 has 32 divisors (see below), whose sum is σ = 397640880. Its totient is φ = 75423744.

The previous prime is 204702247. The next prime is 204702307. The reversal of 204702290 is 92207402.

It can be written as a sum of positive squares in 8 ways, for example, as 173106649 + 31595641 = 13157^2 + 5621^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73646 + ... + 76374.

Almost surely, 2^204702290 is an apocalyptic number.

204702290 is a deficient number, since it is larger than the sum of its proper divisors (192938590).

204702290 is a wasteful number, since it uses less digits than its factorization.

204702290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 204702290 is about 14307.4208018077. The cubic root of 204702290 is about 589.3512835378.

Adding to 204702290 its reverse (92207402), we get a palindrome (296909692).

The spelling of 204702290 in words is "two hundred four million, seven hundred two thousand, two hundred ninety".