7828225 has 6 divisors (see below), whose sum is σ = 9707030. Its totient is φ = 6262560.

The previous prime is 7828217. The next prime is 7828237. The reversal of 7828225 is 5228287.

It can be written as a sum of positive squares in 3 ways, for example, as 10609 + 7817616 = 103^2 + 2796^2 .

It is not a de Polignac number, because 7828225 - 2³ = 7828217 is a prime.

It is a super-3 number, since 3×7828225³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156540 + ... + 156589.

Almost surely, 2^7828225 is an apocalyptic number.

It is an amenable number.

7828225 is a deficient number, since it is larger than the sum of its proper divisors (1878805).

7828225 is a wasteful number, since it uses less digits than its factorization.

7828225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313139 (or 313134 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 7828225 is about 2797.8965313249. The cubic root of 7828225 is about 198.5581723093.

The spelling of 7828225 in words is "seven million, eight hundred twenty-eight thousand, two hundred twenty-five".