8404426 has 16 divisors (see below), whose sum is σ = 13676040. Its totient is φ = 3857920.

The previous prime is 8404411. The next prime is 8404427. The reversal of 8404426 is 6244048.

It can be written as a sum of positive squares in 4 ways, for example, as 7834401 + 570025 = 2799^2 + 755^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8404394 and 8404403.

It is not an unprimeable number, because it can be changed into a prime (8404427) 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, 1621 + ... + 4408.

Almost surely, 2^8404426 is an apocalyptic number.

8404426 is a deficient number, since it is larger than the sum of its proper divisors (5271614).

8404426 is a wasteful number, since it uses less digits than its factorization.

8404426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 8404426 is about 2899.0388062253. The cubic root of 8404426 is about 203.3149680328.

The spelling of 8404426 in words is "eight million, four hundred four thousand, four hundred twenty-six".