290021304 has 16 divisors (see below), whose sum is σ = 725053320. Its totient is φ = 96673760.

The previous prime is 290021299. The next prime is 290021317. The reversal of 290021304 is 403120092.

It is a super-2 number, since 2×290021304² = 168224713547720832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6042087 + ... + 6042134.

Almost surely, 2^290021304 is an apocalyptic number.

290021304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

290021304 is an abundant number, since it is smaller than the sum of its proper divisors (435032016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

290021304 is a wasteful number, since it uses less digits than its factorization.

290021304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12084230 (or 12084226 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 290021304 is about 17030.0118614169. The cubic root of 290021304 is about 661.9268028463.

Adding to 290021304 its reverse (403120092), we get a palindrome (693141396).

The spelling of 290021304 in words is "two hundred ninety million, twenty-one thousand, three hundred four".