394774728 has 16 divisors (see below), whose sum is σ = 986936880. Its totient is φ = 131591568.

The previous prime is 394774727. The next prime is 394774747. The reversal of 394774728 is 827477493.

It is not an unprimeable number, because it can be changed into a prime (394774727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8224450 + ... + 8224497.

It is an arithmetic number, because the mean of its divisors is an integer number (61683555).

Almost surely, 2^394774728 is an apocalyptic number.

It is an amenable number.

394774728 is an abundant number, since it is smaller than the sum of its proper divisors (592162152).

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

394774728 is a wasteful number, since it uses less digits than its factorization.

394774728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16448956 (or 16448952 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 51.

The square root of 394774728 is about 19868.9387738752. The cubic root of 394774728 is about 733.5838826158.

The spelling of 394774728 in words is "three hundred ninety-four million, seven hundred seventy-four thousand, seven hundred twenty-eight".