394427856 has 40 divisors (see below), whose sum is σ = 1027969920. Its totient is φ = 130310656.

The previous prime is 394427843. The next prime is 394427867. The reversal of 394427856 is 658724493.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent 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, 30936 + ... + 41783.

It is an arithmetic number, because the mean of its divisors is an integer number (25699248).

Almost surely, 2^394427856 is an apocalyptic number.

It is an amenable number.

394427856 is an abundant number, since it is smaller than the sum of its proper divisors (633542064).

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

394427856 is a wasteful number, since it uses less digits than its factorization.

394427856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72843 (or 72837 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 394427856 is about 19860.2078538972. The cubic root of 394427856 is about 733.3689631908.

The spelling of 394427856 in words is "three hundred ninety-four million, four hundred twenty-seven thousand, eight hundred fifty-six".