286863642 has 72 divisors (see below), whose sum is σ = 678043548. Its totient is φ = 87609600.

The previous prime is 286863611. The next prime is 286863667. The reversal of 286863642 is 246368682.

286863642 is a `hidden beast` number, since 2 + 8 + 6 + 8 + 636 + 4 + 2 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 881721 + 285981921 = 939^2 + 16911^2 .

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 550342 + ... + 550862.

Almost surely, 2^286863642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 286863642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339021774).

286863642 is an abundant number, since it is smaller than the sum of its proper divisors (391179906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

286863642 is a wasteful number, since it uses less digits than its factorization.

286863642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 720 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 286863642 is about 16937.0493888398. The cubic root of 286863642 is about 659.5157467104.

The spelling of 286863642 in words is "two hundred eighty-six million, eight hundred sixty-three thousand, six hundred forty-two".