394445072 has 20 divisors (see below), whose sum is σ = 873414336. Its totient is φ = 169047840.

The previous prime is 394445071. The next prime is 394445081. The reversal of 394445072 is 270544493.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (394445071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760804 + ... + 1761027.

Almost surely, 2^394445072 is an apocalyptic number.

It is an amenable number.

394445072 is an abundant number, since it is smaller than the sum of its proper divisors (478969264).

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

394445072 is a wasteful number, since it uses less digits than its factorization.

394445072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521846 (or 3521840 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 394445072 is about 19860.6412786697. The cubic root of 394445072 is about 733.3796330731.

The spelling of 394445072 in words is "three hundred ninety-four million, four hundred forty-five thousand, seventy-two".