6618428 has 12 divisors (see below), whose sum is σ = 11801160. Its totient is φ = 3246672.

The previous prime is 6618421. The next prime is 6618433. The reversal of 6618428 is 8248166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6618421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15398 + ... + 15821.

It is an arithmetic number, because the mean of its divisors is an integer number (983430).

Almost surely, 2^6618428 is an apocalyptic number.

It is an amenable number.

6618428 is a deficient number, since it is larger than the sum of its proper divisors (5182732).

6618428 is a wasteful number, since it uses less digits than its factorization.

6618428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31276 (or 31274 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 6618428 is about 2572.6305603409. The cubic root of 6618428 is about 187.7521632396.

The spelling of 6618428 in words is "six million, six hundred eighteen thousand, four hundred twenty-eight".