6628990 has 8 divisors (see below), whose sum is σ = 11932200. Its totient is φ = 2651592.

The previous prime is 6628981. The next prime is 6629033. The reversal of 6628990 is 998266.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 331440 + ... + 331459.

It is an arithmetic number, because the mean of its divisors is an integer number (1491525).

Almost surely, 2^6628990 is an apocalyptic number.

6628990 is a deficient number, since it is larger than the sum of its proper divisors (5303210).

6628990 is a wasteful number, since it uses less digits than its factorization.

6628990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662906.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 6628990 is about 2574.6825046984. The cubic root of 6628990 is about 187.8519847484.

The spelling of 6628990 in words is "six million, six hundred twenty-eight thousand, nine hundred ninety".