426664287 has 16 divisors (see below), whose sum is σ = 722394880. Its totient is φ = 243808056.

The previous prime is 426664267. The next prime is 426664313. The reversal of 426664287 is 782466624.

It is not a de Polignac number, because 426664287 - 2¹⁶ = 426598751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426664267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1128553 + ... + 1128930.

It is an arithmetic number, because the mean of its divisors is an integer number (45149680).

Almost surely, 2^426664287 is an apocalyptic number.

426664287 is a deficient number, since it is larger than the sum of its proper divisors (295730593).

426664287 is a wasteful number, since it uses less digits than its factorization.

426664287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257499 (or 2257493 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 426664287 is about 20655.8535771340. The cubic root of 426664287 is about 752.8274235072.

The spelling of 426664287 in words is "four hundred twenty-six million, six hundred sixty-four thousand, two hundred eighty-seven".