6628920 has 64 divisors (see below), whose sum is σ = 20437920. Its totient is φ = 1718784.

The previous prime is 6628879. The next prime is 6628943. The reversal of 6628920 is 298266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3694 + ... + 5186.

Almost surely, 2^6628920 is an apocalyptic number.

6628920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6628920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10218960).

6628920 is an abundant number, since it is smaller than the sum of its proper divisors (13809000).

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

6628920 is a wasteful number, since it uses less digits than its factorization.

6628920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6628920 is about 2574.6689107534. The cubic root of 6628920 is about 187.8513235272.

The spelling of 6628920 in words is "six million, six hundred twenty-eight thousand, nine hundred twenty".