8722440 has 48 divisors (see below), whose sum is σ = 28349100. Its totient is φ = 2325888.

The previous prime is 8722429. The next prime is 8722447. The reversal of 8722440 is 442278.

8722440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7986276 + 736164 = 2826^2 + 858^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8722447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11755 + ... + 12474.

Almost surely, 2^8722440 is an apocalyptic number.

It is an amenable number.

8722440 is an abundant number, since it is smaller than the sum of its proper divisors (19626660).

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

8722440 is a wasteful number, since it uses less digits than its factorization.

8722440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24246 (or 24239 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 8722440 is about 2953.3777272811. The cubic root of 8722440 is about 205.8476895944.

The spelling of 8722440 in words is "eight million, seven hundred twenty-two thousand, four hundred forty".