6628388 has 24 divisors (see below), whose sum is σ = 12800760. Its totient is φ = 2983680.

The previous prime is 6628379. The next prime is 6628403. The reversal of 6628388 is 8838266.

6628388 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 438244 + 6190144 = 662^2 + 2488^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578 + ... + 3686.

It is an arithmetic number, because the mean of its divisors is an integer number (533365).

Almost surely, 2^6628388 is an apocalyptic number.

It is an amenable number.

6628388 is a deficient number, since it is larger than the sum of its proper divisors (6172372).

6628388 is a wasteful number, since it uses less digits than its factorization.

6628388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167 (or 3165 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 6628388 is about 2574.5655944256. The cubic root of 6628388 is about 187.8462980943.

The spelling of 6628388 in words is "six million, six hundred twenty-eight thousand, three hundred eighty-eight".