404426 has 16 divisors (see below), whose sum is σ = 684288. Its totient is φ = 177600.

The previous prime is 404423. The next prime is 404429. The reversal of 404426 is 624404.

It is an interprime number because it is at equal distance from previous prime (404423) and next prime (404429).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 404398 and 404407.

It is not an unprimeable number, because it can be changed into a prime (404423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386 + ... + 978.

It is an arithmetic number, because the mean of its divisors is an integer number (42768).

2⁴⁰⁴⁴²⁶ is an apocalyptic number.

404426 is a deficient number, since it is larger than the sum of its proper divisors (279862).

404426 is a wasteful number, since it uses less digits than its factorization.

404426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637.

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

The square root of 404426 is about 635.9449661724. The cubic root of 404426 is about 73.9513924761.

The spelling of 404426 in words is "four hundred four thousand, four hundred twenty-six".