426404 has 18 divisors (see below), whose sum is σ = 821142. Its totient is φ = 193600.

The previous prime is 426401. The next prime is 426407. The reversal of 426404 is 404624.

It is an interprime number because it is at equal distance from previous prime (426401) and next prime (426407).

It can be written as a sum of positive squares in only one way, i.e., 302500 + 123904 = 550^2 + 352^2 .

It is not an unprimeable number, because it can be changed into a prime (426401) 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 in 5 ways as a sum of consecutive naturals, for example, 44 + ... + 924.

It is an arithmetic number, because the mean of its divisors is an integer number (45619).

2⁴²⁶⁴⁰⁴ is an apocalyptic number.

426404 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

426404 is a deficient number, since it is larger than the sum of its proper divisors (394738).

426404 is a wasteful number, since it uses less digits than its factorization.

426404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 426404 is about 652.9961715049. The cubic root of 426404 is about 75.2674304644.

It can be divided in two parts, 42 and 6404, that added together give a palindrome (6446).

The spelling of 426404 in words is "four hundred twenty-six thousand, four hundred four".