8722278 has 24 divisors (see below), whose sum is σ = 18959616. Its totient is φ = 2898000.

The previous prime is 8722237. The next prime is 8722283.

8722278 is nontrivially palindromic in base 10 and base 11.

It is a d-powerful number, because it can be written as 8² + 7⁶ + 2² + 2¹⁶ + 2²³ + 7⁶ + 8⁵ .

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 7003 + ... + 8153.

It is an arithmetic number, because the mean of its divisors is an integer number (789984).

Almost surely, 2^8722278 is an apocalyptic number.

8722278 is an abundant number, since it is smaller than the sum of its proper divisors (10237338).

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

8722278 is a wasteful number, since it uses less digits than its factorization.

8722278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1577 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 8722278 is about 2953.3503009294. The cubic root of 8722278 is about 205.8464151982.

The spelling of 8722278 in words is "eight million, seven hundred twenty-two thousand, two hundred seventy-eight".