863852994 has 48 divisors (see below), whose sum is σ = 1987898328. Its totient is φ = 270176256.

The previous prime is 863852987. The next prime is 863852999. The reversal of 863852994 is 499258368.

863852994 is a `hidden beast` number, since 86 + 38 + 529 + 9 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 617771025 + 246081969 = 24855^2 + 15687^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 863852994.

It is not an unprimeable number, because it can be changed into a prime (863852999) 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, 98934 + ... + 107310.

Almost surely, 2^863852994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863852994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993949164).

863852994 is an abundant number, since it is smaller than the sum of its proper divisors (1124045334).

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

863852994 is a wasteful number, since it uses less digits than its factorization.

863852994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8739 (or 8736 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 863852994 is about 29391.3761841803. The cubic root of 863852994 is about 952.3866101820.

The spelling of 863852994 in words is "eight hundred sixty-three million, eight hundred fifty-two thousand, nine hundred ninety-four".