394972250 has 16 divisors (see below), whose sum is σ = 739388520. Its totient is φ = 157988800.

The previous prime is 394972241. The next prime is 394972273. The reversal of 394972250 is 52279493.

It can be written as a sum of positive squares in 4 ways, for example, as 130942249 + 264030001 = 11443^2 + 16249^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 394972198 and 394972207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789695 + ... + 790194.

Almost surely, 2^394972250 is an apocalyptic number.

394972250 is a deficient number, since it is larger than the sum of its proper divisors (344416270).

394972250 is a wasteful number, since it uses less digits than its factorization.

394972250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579906 (or 1579896 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 394972250 is about 19873.9087750749. The cubic root of 394972250 is about 733.7062095918.

The spelling of 394972250 in words is "three hundred ninety-four million, nine hundred seventy-two thousand, two hundred fifty".