394509372 has 12 divisors (see below), whose sum is σ = 920521896. Its totient is φ = 131503120.

The previous prime is 394509319. The next prime is 394509397. The reversal of 394509372 is 273905493.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16437879 + ... + 16437902.

It is an arithmetic number, because the mean of its divisors is an integer number (76710158).

Almost surely, 2^394509372 is an apocalyptic number.

It is an amenable number.

394509372 is an abundant number, since it is smaller than the sum of its proper divisors (526012524).

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

394509372 is a wasteful number, since it uses less digits than its factorization.

394509372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32875788 (or 32875786 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 394509372 is about 19862.2599922567. The cubic root of 394509372 is about 733.4194812477.

The spelling of 394509372 in words is "three hundred ninety-four million, five hundred nine thousand, three hundred seventy-two".