426664394 has 16 divisors (see below), whose sum is σ = 696336648. Its totient is φ = 194890752.

The previous prime is 426664391. The next prime is 426664417. The reversal of 426664394 is 493466624.

It can be written as a sum of positive squares in 4 ways, for example, as 398521369 + 28143025 = 19963^2 + 5305^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (426664391) 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, 82067 + ... + 87110.

Almost surely, 2^426664394 is an apocalyptic number.

426664394 is a deficient number, since it is larger than the sum of its proper divisors (269672254).

426664394 is a wasteful number, since it uses less digits than its factorization.

426664394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169289.

The product of its digits is 746496, while the sum is 44.

The square root of 426664394 is about 20655.8561671987. The cubic root of 426664394 is about 752.8274864392.

The spelling of 426664394 in words is "four hundred twenty-six million, six hundred sixty-four thousand, three hundred ninety-four".