863866944 has 84 divisors (see below), whose sum is σ = 2567872944. Its totient is φ = 287950464.

The previous prime is 863866937. The next prime is 863866957. The reversal of 863866944 is 449668368.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12222 + ... + 43325.

It is an arithmetic number, because the mean of its divisors is an integer number (30569916).

Almost surely, 2^863866944 is an apocalyptic number.

It is an amenable number.

863866944 is an abundant number, since it is smaller than the sum of its proper divisors (1704006000).

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

863866944 is an equidigital number, since it uses as much as digits as its factorization.

863866944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55574 (or 55552 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The square root of 863866944 is about 29391.6134977309. The cubic root of 863866944 is about 952.3917367185.

The spelling of 863866944 in words is "eight hundred sixty-three million, eight hundred sixty-six thousand, nine hundred forty-four".