394819040 has 192 divisors, whose sum is σ = 1181537280. Its totient is φ = 121098240.

The previous prime is 394819039. The next prime is 394819063. The reversal of 394819040 is 40918493.

It is a junction number, because it is equal to n+sod(n) for n = 394818985 and 394819003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 899141 + ... + 899579.

It is an arithmetic number, because the mean of its divisors is an integer number (6153840).

Almost surely, 2^394819040 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 394819040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590768640).

394819040 is an abundant number, since it is smaller than the sum of its proper divisors (786718240).

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

394819040 is a wasteful number, since it uses less digits than its factorization.

394819040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 394819040 is about 19870.0538499522. The cubic root of 394819040 is about 733.6113289462.

The spelling of 394819040 in words is "three hundred ninety-four million, eight hundred nineteen thousand, forty".