394149618 has 64 divisors (see below), whose sum is σ = 896745600. Its totient is φ = 128286720.

The previous prime is 394149589. The next prime is 394149629. The reversal of 394149618 is 816941493.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 614578 + ... + 615218.

It is an arithmetic number, because the mean of its divisors is an integer number (14011650).

Almost surely, 2^394149618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394149618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448372800).

394149618 is an abundant number, since it is smaller than the sum of its proper divisors (502595982).

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

394149618 is a wasteful number, since it uses less digits than its factorization.

394149618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 898 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 394149618 is about 19853.2017065258. The cubic root of 394149618 is about 733.1964778132.

The spelling of 394149618 in words is "three hundred ninety-four million, one hundred forty-nine thousand, six hundred eighteen".