394385472 has 168 divisors, whose sum is σ = 1257401600. Its totient is φ = 117365760.

The previous prime is 394385461. The next prime is 394385477. The reversal of 394385472 is 274583493.

It is not an unprimeable number, because it can be changed into a prime (394385477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231279 + ... + 232977.

Almost surely, 2^394385472 is an apocalyptic number.

394385472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394385472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628700800).

394385472 is an abundant number, since it is smaller than the sum of its proper divisors (863016128).

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

394385472 is a wasteful number, since it uses less digits than its factorization.

394385472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1748 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 394385472 is about 19859.1407669113. The cubic root of 394385472 is about 733.3426937281.

The spelling of 394385472 in words is "three hundred ninety-four million, three hundred eighty-five thousand, four hundred seventy-two".