7200640 has 32 divisors (see below), whose sum is σ = 17215560. Its totient is φ = 2880000.

The previous prime is 7200629. The next prime is 7200643. The reversal of 7200640 is 460027.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7200643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4986 + ... + 6265.

Almost surely, 2^7200640 is an apocalyptic number.

It is an amenable number.

7200640 is an abundant number, since it is smaller than the sum of its proper divisors (10014920).

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

7200640 is a wasteful number, since it uses less digits than its factorization.

7200640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11270 (or 11258 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 7200640 is about 2683.4008273085. The cubic root of 7200640 is about 193.1035981702.

Adding to 7200640 its reverse (460027), we get a palindrome (7660667).

The spelling of 7200640 in words is "seven million, two hundred thousand, six hundred forty".