863734638 has 32 divisors (see below), whose sum is σ = 1865104416. Its totient is φ = 265085568.

The previous prime is 863734633. The next prime is 863734681. The reversal of 863734638 is 836437368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863734631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17020 + ... + 44912.

It is an arithmetic number, because the mean of its divisors is an integer number (58284513).

Almost surely, 2^863734638 is an apocalyptic number.

863734638 is an abundant number, since it is smaller than the sum of its proper divisors (1001369778).

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

863734638 is a wasteful number, since it uses less digits than its factorization.

863734638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28308.

The product of its digits is 1741824, while the sum is 48.

The square root of 863734638 is about 29389.3626674686. The cubic root of 863734638 is about 952.3431128822.

The spelling of 863734638 in words is "eight hundred sixty-three million, seven hundred thirty-four thousand, six hundred thirty-eight".