425638 has 16 divisors (see below), whose sum is σ = 702720. Its totient is φ = 192456.

The previous prime is 425609. The next prime is 425641. The reversal of 425638 is 836524.

425638 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631 + ... + 1117.

It is an arithmetic number, because the mean of its divisors is an integer number (43920).

2⁴²⁵⁶³⁸ is an apocalyptic number.

425638 is a deficient number, since it is larger than the sum of its proper divisors (277082).

425638 is a wasteful number, since it uses less digits than its factorization.

425638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

The product of its digits is 5760, while the sum is 28.

The square root of 425638 is about 652.4093806806. The cubic root of 425638 is about 75.2223328494. Note that the first 3 decimals are identical.

The spelling of 425638 in words is "four hundred twenty-five thousand, six hundred thirty-eight".