426644 has 6 divisors (see below), whose sum is σ = 746634. Its totient is φ = 213320.

The previous prime is 426641. The next prime is 426661. The reversal of 426644 is 446624.

It can be written as a sum of positive squares in only one way, i.e., 407044 + 19600 = 638^2 + 140^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53327 + ... + 53334.

It is an arithmetic number, because the mean of its divisors is an integer number (124439).

2⁴²⁶⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

426644 is a deficient number, since it is larger than the sum of its proper divisors (319990).

426644 is a wasteful number, since it uses less digits than its factorization.

426644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106665 (or 106663 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 426644 is about 653.1799139594. The cubic root of 426644 is about 75.2815491525.

The spelling of 426644 in words is "four hundred twenty-six thousand, six hundred forty-four".