863538894 has 48 divisors (see below), whose sum is σ = 1948302720. Its totient is φ = 286659000.

The previous prime is 863538877. The next prime is 863538983. The reversal of 863538894 is 498835368.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 863538894.

It is a congruent number.

It is an unprimeable number.

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, 118447 + ... + 125525.

It is an arithmetic number, because the mean of its divisors is an integer number (40589640).

Almost surely, 2^863538894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863538894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (974151360).

863538894 is an abundant number, since it is smaller than the sum of its proper divisors (1084763826).

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

863538894 is a wasteful number, since it uses less digits than its factorization.

863538894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7347 (or 7335 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 863538894 is about 29386.0322942721. The cubic root of 863538894 is about 952.2711658104.

The spelling of 863538894 in words is "eight hundred sixty-three million, five hundred thirty-eight thousand, eight hundred ninety-four".