634426 has 12 divisors (see below), whose sum is σ = 1031022. Its totient is φ = 292656.

The previous prime is 634421. The next prime is 634441. The reversal of 634426 is 624436.

It can be written as a sum of positive squares in 3 ways, for example, as 358801 + 275625 = 599^2 + 525^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 634426.

It is not an unprimeable number, because it can be changed into a prime (634421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 601 + ... + 1276.

2⁶³⁴⁴²⁶ is an apocalyptic number.

634426 is a deficient number, since it is larger than the sum of its proper divisors (396596).

634426 is a wasteful number, since it uses less digits than its factorization.

634426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905 (or 1892 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 634426 is about 796.5086314661. The cubic root of 634426 is about 85.9264740234.

It can be divided in two parts, 63 and 4426, that added together give a square (4489 = 67²).

The spelling of 634426 in words is "six hundred thirty-four thousand, four hundred twenty-six".