8628720 has 80 divisors (see below), whose sum is σ = 27036960. Its totient is φ = 2276352.

The previous prime is 8628709. The next prime is 8628727. The reversal of 8628720 is 278268.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8628727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37566 + ... + 37794.

It is an arithmetic number, because the mean of its divisors is an integer number (337962).

Almost surely, 2^8628720 is an apocalyptic number.

8628720 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 8628720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13518480).

8628720 is an abundant number, since it is smaller than the sum of its proper divisors (18408240).

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

8628720 is a wasteful number, since it uses less digits than its factorization.

8628720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 8628720 is about 2937.4682977013. The cubic root of 8628720 is about 205.1077759676.

The spelling of 8628720 in words is "eight million, six hundred twenty-eight thousand, seven hundred twenty".