394431650 has 24 divisors (see below), whose sum is σ = 734166180. Its totient is φ = 157660160.

The previous prime is 394431649. The next prime is 394431701. The reversal of 394431650 is 56134493.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 50737129 + 343694521 = 7123^2 + 18539^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 394431650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131366 + ... + 134334.

Almost surely, 2^394431650 is an apocalyptic number.

394431650 is a deficient number, since it is larger than the sum of its proper divisors (339734530).

394431650 is a wasteful number, since it uses less digits than its factorization.

394431650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5638 (or 5633 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 394431650 is about 19860.3033712982. The cubic root of 394431650 is about 733.3713146077.

The spelling of 394431650 in words is "three hundred ninety-four million, four hundred thirty-one thousand, six hundred fifty".