8643426 has 32 divisors (see below), whose sum is σ = 18992448. Its totient is φ = 2600640.

The previous prime is 8643409. The next prime is 8643433. The reversal of 8643426 is 6243468.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11040 + ... + 11796.

It is an arithmetic number, because the mean of its divisors is an integer number (593514).

Almost surely, 2^8643426 is an apocalyptic number.

8643426 is an abundant number, since it is smaller than the sum of its proper divisors (10349022).

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

8643426 is a wasteful number, since it uses less digits than its factorization.

8643426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its digits is 27648, while the sum is 33.

The square root of 8643426 is about 2939.9704080143. The cubic root of 8643426 is about 205.2242321356.

The spelling of 8643426 in words is "eight million, six hundred forty-three thousand, four hundred twenty-six".