8623647720 has 256 divisors, whose sum is σ = 29972332800. Its totient is φ = 2203407360.

The previous prime is 8623647719. The next prime is 8623647731. The reversal of 8623647720 is 277463268.

It is a super-2 number, since 2×8623647720² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2675710 + ... + 2678930.

It is an arithmetic number, because the mean of its divisors is an integer number (117079425).

Almost surely, 2^8623647720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8623647720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14986166400).

8623647720 is an abundant number, since it is smaller than the sum of its proper divisors (21348685080).

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

8623647720 is a wasteful number, since it uses less digits than its factorization.

8623647720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The square root of 8623647720 is about 92863.5973888585. The cubic root of 8623647720 is about 2050.6757811706.

It can be divided in two parts, 86236 and 47720, that added together give a square (133956 = 366²).

The spelling of 8623647720 in words is "eight billion, six hundred twenty-three million, six hundred forty-seven thousand, seven hundred twenty".