6620628 has 48 divisors (see below), whose sum is σ = 17781120. Its totient is φ = 1878144.

The previous prime is 6620617. The next prime is 6620629. The reversal of 6620628 is 8260266.

It is a super-2 number, since 2×6620628² = 87665430228768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6620595 and 6620604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22450 + ... + 22742.

It is an arithmetic number, because the mean of its divisors is an integer number (370440).

Almost surely, 2^6620628 is an apocalyptic number.

It is an amenable number.

6620628 is an abundant number, since it is smaller than the sum of its proper divisors (11160492).

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

6620628 is a wasteful number, since it uses less digits than its factorization.

6620628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 6620628 is about 2573.0581027252. The cubic root of 6620628 is about 187.7729642012.

The spelling of 6620628 in words is "six million, six hundred twenty thousand, six hundred twenty-eight".