8640722 has 8 divisors (see below), whose sum is σ = 13154736. Its totient is φ = 4255812.

The previous prime is 8640719. The next prime is 8640733. The reversal of 8640722 is 2270468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

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 3 ways as a sum of consecutive naturals, for example, 32108 + ... + 32375.

It is an arithmetic number, because the mean of its divisors is an integer number (1644342).

Almost surely, 2^8640722 is an apocalyptic number.

8640722 is a deficient number, since it is larger than the sum of its proper divisors (4514014).

8640722 is a wasteful number, since it uses less digits than its factorization.

8640722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64552.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 8640722 is about 2939.5105034682. The cubic root of 8640722 is about 205.2028291949.

The spelling of 8640722 in words is "eight million, six hundred forty thousand, seven hundred twenty-two".