8205731394 has 96 divisors (see below), whose sum is σ = 20275500096. Its totient is φ = 2199859200.

The previous prime is 8205731389. The next prime is 8205731441. The reversal of 8205731394 is 4931375028.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1761969 + ... + 1766619.

It is an arithmetic number, because the mean of its divisors is an integer number (211203126).

Almost surely, 2^8205731394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8205731394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10137750048).

8205731394 is an abundant number, since it is smaller than the sum of its proper divisors (12069768702).

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

8205731394 is a wasteful number, since it uses less digits than its factorization.

8205731394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040 (or 5033 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 8205731394 is about 90585.4921827993. The cubic root of 8205731394 is about 2016.9993839341. Note that the first 3 decimals are identical.

The spelling of 8205731394 in words is "eight billion, two hundred five million, seven hundred thirty-one thousand, three hundred ninety-four".