8491954394 has 48 divisors (see below), whose sum is σ = 15979553856. Its totient is φ = 3288158400.

The previous prime is 8491954381. The next prime is 8491954409. The reversal of 8491954394 is 4934591948.

It is a super-2 number, since 2×8491954394² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

Its product of digits (5598720) is a multiple of the sum of its prime divisors (1920).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4933454 + ... + 4935174.

It is an arithmetic number, because the mean of its divisors is an integer number (332907372).

Almost surely, 2^8491954394 is an apocalyptic number.

8491954394 is a deficient number, since it is larger than the sum of its proper divisors (7487599462).

8491954394 is a wasteful number, since it uses less digits than its factorization.

8491954394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 1920 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 56.

The square root of 8491954394 is about 92151.8008179981. The cubic root of 8491954394 is about 2040.1834381054.

The spelling of 8491954394 in words is "eight billion, four hundred ninety-one million, nine hundred fifty-four thousand, three hundred ninety-four".