7200740 has 12 divisors (see below), whose sum is σ = 15121596. Its totient is φ = 2880288.

The previous prime is 7200733. The next prime is 7200751. The reversal of 7200740 is 470027.

7200740 = 183² + 184² + ... + 302².

It can be written as a sum of positive squares in 2 ways, for example, as 4351396 + 2849344 = 2086^2 + 1688^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 360037 = 7200740 / (7 + 2 + 0 + 0 + 7 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179999 + ... + 180038.

It is an arithmetic number, because the mean of its divisors is an integer number (1260133).

Almost surely, 2^7200740 is an apocalyptic number.

It is an amenable number.

7200740 is an abundant number, since it is smaller than the sum of its proper divisors (7920856).

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

7200740 is a wasteful number, since it uses less digits than its factorization.

7200740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360046 (or 360044 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 7200740 is about 2683.4194603155. The cubic root of 7200740 is about 193.1044920847.

Adding to 7200740 its reverse (470027), we get a palindrome (7670767).

The spelling of 7200740 in words is "seven million, two hundred thousand, seven hundred forty".