7788228 has 24 divisors (see below), whose sum is σ = 20768832. Its totient is φ = 2225184.

The previous prime is 7788199. The next prime is 7788247. The reversal of 7788228 is 8228877.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 7788228.

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 7 ways as a sum of consecutive naturals, for example, 46275 + ... + 46442.

It is an arithmetic number, because the mean of its divisors is an integer number (865368).

Almost surely, 2^7788228 is an apocalyptic number.

It is an amenable number.

7788228 is an abundant number, since it is smaller than the sum of its proper divisors (12980604).

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

7788228 is a wasteful number, since it uses less digits than its factorization.

7788228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92731 (or 92729 counting only the distinct ones).

The product of its digits is 100352, while the sum is 42.

The square root of 7788228 is about 2790.7396868931. The cubic root of 7788228 is about 198.2194281968.

The spelling of 7788228 in words is "seven million, seven hundred eighty-eight thousand, two hundred twenty-eight".