7280520 has 96 divisors (see below), whose sum is σ = 23716800. Its totient is φ = 1787136.

The previous prime is 7280513. The next prime is 7280521. The reversal of 7280520 is 250827.

7280520 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (7280521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20101 + ... + 20459.

It is an arithmetic number, because the mean of its divisors is an integer number (247050).

Almost surely, 2^7280520 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 7280520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11858400).

7280520 is an abundant number, since it is smaller than the sum of its proper divisors (16436280).

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

7280520 is a wasteful number, since it uses less digits than its factorization.

7280520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 7280520 is about 2698.2438733369. The cubic root of 7280520 is about 193.8150360927.

The spelling of 7280520 in words is "seven million, two hundred eighty thousand, five hundred twenty".