394793728 has 72 divisors (see below), whose sum is σ = 907208960. Its totient is φ = 167961600.

The previous prime is 394793717. The next prime is 394793743. The reversal of 394793728 is 827397493.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269863 + ... + 271321.

Almost surely, 2^394793728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394793728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453604480).

394793728 is an abundant number, since it is smaller than the sum of its proper divisors (512415232).

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

394793728 is a wasteful number, since it uses less digits than its factorization.

394793728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1619 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 52.

The square root of 394793728 is about 19869.4169013587. The cubic root of 394793728 is about 733.5956512433.

The spelling of 394793728 in words is "three hundred ninety-four million, seven hundred ninety-three thousand, seven hundred twenty-eight".