286808661 has 8 divisors (see below), whose sum is σ = 424901760. Its totient is φ = 191205756.

The previous prime is 286808651. The next prime is 286808671. The reversal of 286808661 is 166808682.

It is an interprime number because it is at equal distance from previous prime (286808651) and next prime (286808671).

It is not a de Polignac number, because 286808661 - 2¹¹ = 286806613 is a prime.

It is a super-2 number, since 2×286808661² = 164518416049225842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286808611) 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, 5311245 + ... + 5311298.

It is an arithmetic number, because the mean of its divisors is an integer number (53112720).

Almost surely, 2^286808661 is an apocalyptic number.

It is an amenable number.

286808661 is a deficient number, since it is larger than the sum of its proper divisors (138093099).

286808661 is a wasteful number, since it uses less digits than its factorization.

286808661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10622552 (or 10622546 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 286808661 is about 16935.4262125286. The cubic root of 286808661 is about 659.4736092080.

The spelling of 286808661 in words is "two hundred eighty-six million, eight hundred eight thousand, six hundred sixty-one".