8245720 has 64 divisors (see below), whose sum is σ = 21672000. Its totient is φ = 2822400.

The previous prime is 8245711. The next prime is 8245747. The reversal of 8245720 is 275428.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13420 + ... + 14020.

It is an arithmetic number, because the mean of its divisors is an integer number (338625).

Almost surely, 2^8245720 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 8245720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10836000).

8245720 is an abundant number, since it is smaller than the sum of its proper divisors (13426280).

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

8245720 is a wasteful number, since it uses less digits than its factorization.

8245720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 8245720 is about 2871.5361742454. The cubic root of 8245720 is about 202.0270525478.

The spelling of 8245720 in words is "eight million, two hundred forty-five thousand, seven hundred twenty".