290816361 has 18 divisors (see below), whose sum is σ = 461729450. Its totient is φ = 176251680.

The previous prime is 290816303. The next prime is 290816377. The reversal of 290816361 is 163618092.

290816361 is a `hidden beast` number, since 290 + 8 + 1 + 6 + 361 = 666.

It can be written as a sum of positive squares in only one way, i.e., 279926361 + 10890000 = 16731^2 + 3300^2 .

It is not a de Polignac number, because 290816361 - 2⁷ = 290816233 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290816861) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 132436 + ... + 134613.

Almost surely, 2^290816361 is an apocalyptic number.

It is an amenable number.

290816361 is a deficient number, since it is larger than the sum of its proper divisors (170913089).

290816361 is a wasteful number, since it uses less digits than its factorization.

290816361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267077 (or 267063 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 290816361 is about 17053.3387053679. The cubic root of 290816361 is about 662.5311140484.

The spelling of 290816361 in words is "two hundred ninety million, eight hundred sixteen thousand, three hundred sixty-one".