290786431 has 16 divisors (see below), whose sum is σ = 330413440. Its totient is φ = 253692000.

The previous prime is 290786429. The next prime is 290786443. The reversal of 290786431 is 134687092.

It is a cyclic number.

It is not a de Polignac number, because 290786431 - 2¹ = 290786429 is a prime.

It is a super-2 number, since 2×290786431² = 169113496907435522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290786491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128056 + ... + 130306.

It is an arithmetic number, because the mean of its divisors is an integer number (20650840).

Almost surely, 2^290786431 is an apocalyptic number.

290786431 is a deficient number, since it is larger than the sum of its proper divisors (39627009).

290786431 is a wasteful number, since it uses less digits than its factorization.

290786431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 290786431 is about 17052.4611420170. The cubic root of 290786431 is about 662.5083846571.

The spelling of 290786431 in words is "two hundred ninety million, seven hundred eighty-six thousand, four hundred thirty-one".