394812420 has 48 divisors (see below), whose sum is σ = 1170505728. Its totient is φ = 99089920.

The previous prime is 394812401. The next prime is 394812421. The reversal of 394812420 is 24218493.

It is not an unprimeable number, because it can be changed into a prime (394812421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192516 + ... + 194555.

It is an arithmetic number, because the mean of its divisors is an integer number (24385536).

Almost surely, 2^394812420 is an apocalyptic number.

394812420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394812420 is an abundant number, since it is smaller than the sum of its proper divisors (775693308).

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

394812420 is a wasteful number, since it uses less digits than its factorization.

394812420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387100 (or 387098 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 394812420 is about 19869.8872669172. The cubic root of 394812420 is about 733.6072287267.

The spelling of 394812420 in words is "three hundred ninety-four million, eight hundred twelve thousand, four hundred twenty".