394440920 has 32 divisors (see below), whose sum is σ = 906379200. Its totient is φ = 154418688.

The previous prime is 394440899. The next prime is 394440941. The reversal of 394440920 is 29044493.

It is an interprime number because it is at equal distance from previous prime (394440899) and next prime (394440941).

It is a congruent number.

It is an unprimeable number.

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, 103025 + ... + 106784.

It is an arithmetic number, because the mean of its divisors is an integer number (28324350).

Almost surely, 2^394440920 is an apocalyptic number.

It is an amenable number.

394440920 is an abundant number, since it is smaller than the sum of its proper divisors (511938280).

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

394440920 is a wasteful number, since it uses less digits than its factorization.

394440920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209867 (or 209863 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 394440920 is about 19860.5367500478. The cubic root of 394440920 is about 733.3770598353.

The spelling of 394440920 in words is "three hundred ninety-four million, four hundred forty thousand, nine hundred twenty".