8623720 has 64 divisors (see below), whose sum is σ = 23356800. Its totient is φ = 2799360.

The previous prime is 8623717. The next prime is 8623721. The reversal of 8623720 is 273268.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8623721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4510 + ... + 6130.

It is an arithmetic number, because the mean of its divisors is an integer number (364950).

Almost surely, 2^8623720 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 8623720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11678400).

8623720 is an abundant number, since it is smaller than the sum of its proper divisors (14733080).

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

8623720 is a wasteful number, since it uses less digits than its factorization.

8623720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658 (or 1654 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 8623720 is about 2936.6171013600. The cubic root of 8623720 is about 205.0681510472.

Adding to 8623720 its reverse (273268), we get a palindrome (8896988).

The spelling of 8623720 in words is "eight million, six hundred twenty-three thousand, seven hundred twenty".