394401263 has 18 divisors (see below), whose sum is σ = 426049656. Its totient is φ = 364408000.

The previous prime is 394401239. The next prime is 394401269. The reversal of 394401263 is 362104493.

It is not a de Polignac number, because 394401263 - 2⁶ = 394401199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394401269) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3904913 + ... + 3905013.

Almost surely, 2^394401263 is an apocalyptic number.

394401263 is a deficient number, since it is larger than the sum of its proper divisors (31648393).

394401263 is an equidigital number, since it uses as much as digits as its factorization.

394401263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 394401263 is about 19859.5383380380. The cubic root of 394401263 is about 733.3524811575.

The spelling of 394401263 in words is "three hundred ninety-four million, four hundred one thousand, two hundred sixty-three".