394821944 has 32 divisors (see below), whose sum is σ = 813510000. Its totient is φ = 178149120.

The previous prime is 394821941. The next prime is 394821961. The reversal of 394821944 is 449128493.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 394821895 and 394821904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394821941) 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 7 ways as a sum of consecutive naturals, for example, 4319 + ... + 28430.

Almost surely, 2^394821944 is an apocalyptic number.

It is an amenable number.

394821944 is an abundant number, since it is smaller than the sum of its proper divisors (418688056).

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

394821944 is a wasteful number, since it uses less digits than its factorization.

394821944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32903 (or 32899 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 394821944 is about 19870.1269246072. The cubic root of 394821944 is about 733.6131275778.

The spelling of 394821944 in words is "three hundred ninety-four million, eight hundred twenty-one thousand, nine hundred forty-four".