8622720 has 128 divisors (see below), whose sum is σ = 30600000. Its totient is φ = 2294784.

The previous prime is 8622707. The next prime is 8622721. The reversal of 8622720 is 272268.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×8622720³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (8622721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17031 + ... + 17529.

Almost surely, 2^8622720 is an apocalyptic number.

8622720 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 8622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15300000).

8622720 is an abundant number, since it is smaller than the sum of its proper divisors (21977280).

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

8622720 is a wasteful number, since it uses less digits than its factorization.

8622720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 8622720 is about 2936.4468324831. The cubic root of 8622720 is about 205.0602242253.

Adding to 8622720 its reverse (272268), we get a palindrome (8894988).

The spelling of 8622720 in words is "eight million, six hundred twenty-two thousand, seven hundred twenty".