863400263 has 24 divisors (see below), whose sum is σ = 984756528. Its totient is φ = 750464000.

The previous prime is 863400259. The next prime is 863400271. The reversal of 863400263 is 362004368.

It is not a de Polignac number, because 863400263 - 2² = 863400259 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863400203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 979583 + ... + 980463.

It is an arithmetic number, because the mean of its divisors is an integer number (41031522).

Almost surely, 2^863400263 is an apocalyptic number.

863400263 is a deficient number, since it is larger than the sum of its proper divisors (121356265).

863400263 is a wasteful number, since it uses less digits than its factorization.

863400263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 863400263 is about 29383.6734088847. The cubic root of 863400263 is about 952.2202044428.

The spelling of 863400263 in words is "eight hundred sixty-three million, four hundred thousand, two hundred sixty-three".