394446940 has 24 divisors (see below), whose sum is σ = 836084592. Its totient is φ = 156303360.

The previous prime is 394446929. The next prime is 394446947. The reversal of 394446940 is 49644493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394446947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90021 + ... + 94300.

It is an arithmetic number, because the mean of its divisors is an integer number (34836858).

Almost surely, 2^394446940 is an apocalyptic number.

It is an amenable number.

394446940 is an abundant number, since it is smaller than the sum of its proper divisors (441637652).

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

394446940 is a wasteful number, since it uses less digits than its factorization.

394446940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184437 (or 184435 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 394446940 is about 19860.6883063000. The cubic root of 394446940 is about 733.3807907763.

The spelling of 394446940 in words is "three hundred ninety-four million, four hundred forty-six thousand, nine hundred forty".