7272820 has 24 divisors (see below), whose sum is σ = 16077600. Its totient is φ = 2755872.

The previous prime is 7272809. The next prime is 7272829. The reversal of 7272820 is 282727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9190 + ... + 9949.

It is an arithmetic number, because the mean of its divisors is an integer number (669900).

Almost surely, 2^7272820 is an apocalyptic number.

It is an amenable number.

7272820 is an abundant number, since it is smaller than the sum of its proper divisors (8804780).

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

7272820 is a wasteful number, since it uses less digits than its factorization.

7272820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19167 (or 19165 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 7272820 is about 2696.8166418947. The cubic root of 7272820 is about 193.7466846467.

The spelling of 7272820 in words is "seven million, two hundred seventy-two thousand, eight hundred twenty".