286990561 has 24 divisors (see below), whose sum is σ = 340784064. Its totient is φ = 239578560.

The previous prime is 286990553. The next prime is 286990567. The reversal of 286990561 is 165099682.

It is not a de Polignac number, because 286990561 - 2³ = 286990553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (286990567) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 589060 + ... + 589546.

It is an arithmetic number, because the mean of its divisors is an integer number (14199336).

Almost surely, 2^286990561 is an apocalyptic number.

It is an amenable number.

286990561 is a deficient number, since it is larger than the sum of its proper divisors (53793503).

286990561 is a wasteful number, since it uses less digits than its factorization.

286990561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 286990561 is about 16940.7957605303. The cubic root of 286990561 is about 659.6129970239.

The spelling of 286990561 in words is "two hundred eighty-six million, nine hundred ninety thousand, five hundred sixty-one".