394403828 has 48 divisors (see below), whose sum is σ = 878801280. Its totient is φ = 150643584.

The previous prime is 394403803. The next prime is 394403851. The reversal of 394403828 is 828304493.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8126 + ... + 29237.

It is an arithmetic number, because the mean of its divisors is an integer number (18308360).

Almost surely, 2^394403828 is an apocalyptic number.

It is an amenable number.

394403828 is an abundant number, since it is smaller than the sum of its proper divisors (484397452).

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

394403828 is a wasteful number, since it uses less digits than its factorization.

394403828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37416 (or 37414 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 394403828 is about 19859.6029164734. The cubic root of 394403828 is about 733.3540709471.

The spelling of 394403828 in words is "three hundred ninety-four million, four hundred three thousand, eight hundred twenty-eight".