426631306 has 4 divisors (see below), whose sum is σ = 639946962. Its totient is φ = 213315652.

The previous prime is 426631297. The next prime is 426631307. The reversal of 426631306 is 603136624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 409698081 + 16933225 = 20241^2 + 4115^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (426631307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106657825 + ... + 106657828.

Almost surely, 2^426631306 is an apocalyptic number.

426631306 is a deficient number, since it is larger than the sum of its proper divisors (213315656).

426631306 is a wasteful number, since it uses less digits than its factorization.

426631306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213315655.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 426631306 is about 20655.0552165808. The cubic root of 426631306 is about 752.8080252419.

The spelling of 426631306 in words is "four hundred twenty-six million, six hundred thirty-one thousand, three hundred six".