8640422 has 16 divisors (see below), whose sum is σ = 15174432. Its totient is φ = 3612480.

The previous prime is 8640419. The next prime is 8640427. The reversal of 8640422 is 2240468.

It is a junction number, because it is equal to n+sod(n) for n = 8640391 and 8640400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6953 + ... + 8100.

It is an arithmetic number, because the mean of its divisors is an integer number (948402).

Almost surely, 2^8640422 is an apocalyptic number.

8640422 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

8640422 is a deficient number, since it is larger than the sum of its proper divisors (6534010).

8640422 is a wasteful number, since it uses less digits than its factorization.

8640422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15103.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 8640422 is about 2939.4594741211. The cubic root of 8640422 is about 205.2004543332.

The spelling of 8640422 in words is "eight million, six hundred forty thousand, four hundred twenty-two".