8722642 has 8 divisors (see below), whose sum is σ = 13101516. Its totient is φ = 4355472.

The previous prime is 8722631. The next prime is 8722643. The reversal of 8722642 is 2462278.

It can be written as a sum of positive squares in 2 ways, for example, as 8128201 + 594441 = 2851^2 + 771^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8722643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733 + ... + 4240.

Almost surely, 2^8722642 is an apocalyptic number.

8722642 is a deficient number, since it is larger than the sum of its proper divisors (4378874).

8722642 is a wasteful number, since it uses less digits than its factorization.

8722642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852.

The product of its digits is 10752, while the sum is 31.

The square root of 8722642 is about 2953.4119252146. The cubic root of 8722642 is about 205.8492786342.

The spelling of 8722642 in words is "eight million, seven hundred twenty-two thousand, six hundred forty-two".