426820 has 12 divisors (see below), whose sum is σ = 896364. Its totient is φ = 170720.

The previous prime is 426799. The next prime is 426841. The reversal of 426820 is 28624.

It is an interprime number because it is at equal distance from previous prime (426799) and next prime (426841).

It can be written as a sum of positive squares in 2 ways, for example, as 329476 + 97344 = 574^2 + 312^2 .

It is a junction number, because it is equal to n+sod(n) for n = 426791 and 426800.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10651 + ... + 10690.

It is an arithmetic number, because the mean of its divisors is an integer number (74697).

2⁴²⁶⁸²⁰ is an apocalyptic number.

It is an amenable number.

426820 is an abundant number, since it is smaller than the sum of its proper divisors (469544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

426820 is a wasteful number, since it uses less digits than its factorization.

426820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21350 (or 21348 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 426820 is about 653.3146255825. The cubic root of 426820 is about 75.2918994923.

The spelling of 426820 in words is "four hundred twenty-six thousand, eight hundred twenty".