840286863 has 36 divisors (see below), whose sum is σ = 1388580648. Its totient is φ = 486662400.

The previous prime is 840286859. The next prime is 840286873. The reversal of 840286863 is 368682048.

It is a happy number.

It is not a de Polignac number, because 840286863 - 2² = 840286859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840286813) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21388 + ... + 46238.

Almost surely, 2^840286863 is an apocalyptic number.

840286863 is a deficient number, since it is larger than the sum of its proper divisors (548293785).

840286863 is a wasteful number, since it uses less digits than its factorization.

840286863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24904 (or 24884 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 840286863 is about 28987.7019268517. The cubic root of 840286863 is about 943.6461911285.

The spelling of 840286863 in words is "eight hundred forty million, two hundred eighty-six thousand, eight hundred sixty-three".