286980561 has 12 divisors (see below), whose sum is σ = 473745792. Its totient is φ = 163988856.

The previous prime is 286980559. The next prime is 286980569. The reversal of 286980561 is 165089682.

286980561 is a `hidden beast` number, since 2 + 8 + 6 + 9 + 80 + 561 = 666.

It is not a de Polignac number, because 286980561 - 2¹ = 286980559 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (286980569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2277561 + ... + 2277686.

It is an arithmetic number, because the mean of its divisors is an integer number (39478816).

Almost surely, 2^286980561 is an apocalyptic number.

286980561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

286980561 is a deficient number, since it is larger than the sum of its proper divisors (186765231).

286980561 is a wasteful number, since it uses less digits than its factorization.

286980561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555260 (or 4555257 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 286980561 is about 16940.5006124376. The cubic root of 286980561 is about 659.6053356725.

The spelling of 286980561 in words is "two hundred eighty-six million, nine hundred eighty thousand, five hundred sixty-one".