394718891 has 8 divisors (see below), whose sum is σ = 457461504. Its totient is φ = 333564840.

The previous prime is 394718879. The next prime is 394718897. The reversal of 394718891 is 198817493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 394718891 - 2¹⁰ = 394717867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394718897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396605 + ... + 397598.

It is an arithmetic number, because the mean of its divisors is an integer number (57182688).

Almost surely, 2^394718891 is an apocalyptic number.

394718891 is a deficient number, since it is larger than the sum of its proper divisors (62742613).

394718891 is an equidigital number, since it uses as much as digits as its factorization.

394718891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794281.

The product of its digits is 435456, while the sum is 50.

The square root of 394718891 is about 19867.5335912639. The cubic root of 394718891 is about 733.5492949116.

The spelling of 394718891 in words is "three hundred ninety-four million, seven hundred eighteen thousand, eight hundred ninety-one".