7725220 has 24 divisors (see below), whose sum is σ = 16620408. Its totient is φ = 3014400.

The previous prime is 7725199. The next prime is 7725239. The reversal of 7725220 is 225277.

It can be written as a sum of positive squares in 4 ways, for example, as 19044 + 7706176 = 138^2 + 2776^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3891 + ... + 5530.

It is an arithmetic number, because the mean of its divisors is an integer number (692517).

Almost surely, 2^7725220 is an apocalyptic number.

It is an amenable number.

7725220 is an abundant number, since it is smaller than the sum of its proper divisors (8895188).

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

7725220 is a wasteful number, since it uses less digits than its factorization.

7725220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9471 (or 9469 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 7725220 is about 2779.4279987076. The cubic root of 7725220 is about 197.6834379662.

The spelling of 7725220 in words is "seven million, seven hundred twenty-five thousand, two hundred twenty".