8013720 has 128 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 1789440.

The previous prime is 8013703. The next prime is 8013727. The reversal of 8013720 is 273108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8013727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16927 + ... + 17393.

It is an arithmetic number, because the mean of its divisors is an integer number (221130).

Almost surely, 2^8013720 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 8013720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14152320).

8013720 is an abundant number, since it is smaller than the sum of its proper divisors (20290920).

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

8013720 is a wasteful number, since it uses less digits than its factorization.

8013720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 8013720 is about 2830.8514620163. The cubic root of 8013720 is about 200.1142680350.

Adding to 8013720 its reverse (273108), we get a palindrome (8286828).

The spelling of 8013720 in words is "eight million, thirteen thousand, seven hundred twenty".