290223730 has 16 divisors (see below), whose sum is σ = 522751320. Its totient is φ = 116012032.

The previous prime is 290223719. The next prime is 290223733. The reversal of 290223730 is 37322092.

It can be written as a sum of positive squares in 4 ways, for example, as 175112289 + 115111441 = 13233^2 + 10729^2 .

It is a super-3 number, since 3×290223730³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (290223733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7506 + ... + 25234.

Almost surely, 2^290223730 is an apocalyptic number.

290223730 is a deficient number, since it is larger than the sum of its proper divisors (232527590).

290223730 is a wasteful number, since it uses less digits than its factorization.

290223730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19373.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 290223730 is about 17035.9540384447. The cubic root of 290223730 is about 662.0807685853.

The spelling of 290223730 in words is "two hundred ninety million, two hundred twenty-three thousand, seven hundred thirty".