8722391040 has 560 divisors, whose sum is σ = 34254887040. Its totient is φ = 2105671680.

The previous prime is 8722391017. The next prime is 8722391053. The reversal of 8722391040 is 401932278.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8722390986 and 8722391004.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 36495241 + ... + 36495479.

Almost surely, 2^8722391040 is an apocalyptic number.

8722391040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8722391040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17127443520).

8722391040 is an abundant number, since it is smaller than the sum of its proper divisors (25532496000).

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

8722391040 is a wasteful number, since it uses less digits than its factorization.

8722391040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 8722391040 is about 93393.7419745028. The cubic root of 8722391040 is about 2058.4730444524.

The spelling of 8722391040 in words is "eight billion, seven hundred twenty-two million, three hundred ninety-one thousand, forty".