394817650 has 12 divisors (see below), whose sum is σ = 734360922. Its totient is φ = 157927040.

The previous prime is 394817611. The next prime is 394817669. The reversal of 394817650 is 56718493.

It can be written as a sum of positive squares in 3 ways, for example, as 175748049 + 219069601 = 13257^2 + 14801^2 .

It is a junction number, because it is equal to n+sod(n) for n = 394817597 and 394817606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3948127 + ... + 3948226.

Almost surely, 2^394817650 is an apocalyptic number.

394817650 is a deficient number, since it is larger than the sum of its proper divisors (339543272).

394817650 is a wasteful number, since it uses less digits than its factorization.

394817650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7896365 (or 7896360 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 394817650 is about 19870.0188726634. The cubic root of 394817650 is about 733.6104680278.

The spelling of 394817650 in words is "three hundred ninety-four million, eight hundred seventeen thousand, six hundred fifty".