7788225 has 12 divisors (see below), whose sum is σ = 12876656. Its totient is φ = 4153680.

The previous prime is 7788199. The next prime is 7788247. The reversal of 7788225 is 5228877.

It is not a de Polignac number, because 7788225 - 2⁷ = 7788097 is a prime.

It is a d-powerful number, because it can be written as 7⁷ + 7⁸ + 8³ + 8⁴ + 2¹⁷ + 2²⁰ + 5⁶ .

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 51847 + ... + 51996.

Almost surely, 2^7788225 is an apocalyptic number.

7788225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7788225 is a deficient number, since it is larger than the sum of its proper divisors (5088431).

7788225 is a wasteful number, since it uses less digits than its factorization.

7788225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103856 (or 103851 counting only the distinct ones).

The product of its digits is 62720, while the sum is 39.

The square root of 7788225 is about 2790.7391494011. The cubic root of 7788225 is about 198.2194027457.

The spelling of 7788225 in words is "seven million, seven hundred eighty-eight thousand, two hundred twenty-five".