394808493 has 32 divisors (see below), whose sum is σ = 571069440. Its totient is φ = 241713920.

The previous prime is 394808473. The next prime is 394808503.

394808493 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 394808493 - 2¹⁷ = 394677421 is a prime.

It is a super-2 number, since 2×394808493² = 311747492289862098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394808443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 386938 + ... + 387956.

It is an arithmetic number, because the mean of its divisors is an integer number (17845920).

Almost surely, 2^394808493 is an apocalyptic number.

It is an amenable number.

394808493 is a deficient number, since it is larger than the sum of its proper divisors (176260947).

394808493 is a wasteful number, since it uses less digits than its factorization.

394808493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217.

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 394808493 is about 19869.7884487983. The cubic root of 394808493 is about 733.6047964449.

The spelling of 394808493 in words is "three hundred ninety-four million, eight hundred eight thousand, four hundred ninety-three".