394884018 has 32 divisors (see below), whose sum is σ = 878644800. Its totient is φ = 131459328.

The previous prime is 394884013. The next prime is 394884023. The reversal of 394884018 is 810488493.

It is an interprime number because it is at equal distance from previous prime (394884013) and next prime (394884023).

It is not an unprimeable number, because it can be changed into a prime (394884013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42130 + ... + 50642.

It is an arithmetic number, because the mean of its divisors is an integer number (27457650).

Almost surely, 2^394884018 is an apocalyptic number.

394884018 is an abundant number, since it is smaller than the sum of its proper divisors (483760782).

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

394884018 is a wasteful number, since it uses less digits than its factorization.

394884018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383 (or 9377 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 394884018 is about 19871.6888562598. The cubic root of 394884018 is about 733.6515718400.

The spelling of 394884018 in words is "three hundred ninety-four million, eight hundred eighty-four thousand, eighteen".