394668772 has 24 divisors (see below), whose sum is σ = 720833400. Its totient is φ = 188837376.

The previous prime is 394668761. The next prime is 394668773. The reversal of 394668772 is 277866493.

It can be written as a sum of positive squares in 4 ways, for example, as 10816 + 394657956 = 104^2 + 19866^2 .

It is not an unprimeable number, because it can be changed into a prime (394668773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1947 + ... + 28162.

It is an arithmetic number, because the mean of its divisors is an integer number (30034725).

Almost surely, 2^394668772 is an apocalyptic number.

It is an amenable number.

394668772 is a deficient number, since it is larger than the sum of its proper divisors (326164628).

394668772 is a wasteful number, since it uses less digits than its factorization.

394668772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255 (or 30253 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 52.

The square root of 394668772 is about 19866.2722220350. The cubic root of 394668772 is about 733.5182463906.

The spelling of 394668772 in words is "three hundred ninety-four million, six hundred sixty-eight thousand, seven hundred seventy-two".