8722020628 has 24 divisors (see below), whose sum is σ = 15793694280. Its totient is φ = 4209609600.

The previous prime is 8722020611. The next prime is 8722020641. The reversal of 8722020628 is 8260202278.

It can be written as a sum of positive squares in 4 ways, for example, as 3226467204 + 5495553424 = 56802^2 + 74132^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724950 + ... + 736882.

It is an arithmetic number, because the mean of its divisors is an integer number (658070595).

Almost surely, 2^8722020628 is an apocalyptic number.

It is an amenable number.

8722020628 is a deficient number, since it is larger than the sum of its proper divisors (7071673652).

8722020628 is a wasteful number, since it uses less digits than its factorization.

8722020628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18267 (or 18265 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8722020628 is about 93391.7588869596. The cubic root of 8722020628 is about 2058.4439051217.

The spelling of 8722020628 in words is "eight billion, seven hundred twenty-two million, twenty thousand, six hundred twenty-eight".