394204772 has 48 divisors (see below), whose sum is σ = 813803760. Its totient is φ = 165322752.

The previous prime is 394204729. The next prime is 394204777. The reversal of 394204772 is 277402493.

It can be written as a sum of positive squares in 8 ways, for example, as 46158436 + 348046336 = 6794^2 + 18656^2 .

It is not an unprimeable number, because it can be changed into a prime (394204777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17948 + ... + 33324.

It is an arithmetic number, because the mean of its divisors is an integer number (16954245).

Almost surely, 2^394204772 is an apocalyptic number.

It is an amenable number.

394204772 is an abundant number, since it is smaller than the sum of its proper divisors (419598988).

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

394204772 is a wasteful number, since it uses less digits than its factorization.

394204772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15440 (or 15438 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 394204772 is about 19854.5907034116. The cubic root of 394204772 is about 733.2306753451.

The spelling of 394204772 in words is "three hundred ninety-four million, two hundred four thousand, seven hundred seventy-two".