6620328 has 96 divisors (see below), whose sum is σ = 21097440. Its totient is φ = 1848960.

The previous prime is 6620309. The next prime is 6620351. The reversal of 6620328 is 8230266.

6620328 is a `hidden beast` number, since 6 + 620 + 32 + 8 = 666.

It is a Cunningham number, because it is equal to 2573²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9975 + ... + 10617.

It is an arithmetic number, because the mean of its divisors is an integer number (219765).

Almost surely, 2^6620328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6620328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10548720).

6620328 is an abundant number, since it is smaller than the sum of its proper divisors (14477112).

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

6620328 is a wasteful number, since it uses less digits than its factorization.

6620328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6620328 is about 2572.9998056743. Note that the first 3 decimals coincide. The cubic root of 6620328 is about 187.7701279778.

The spelling of 6620328 in words is "six million, six hundred twenty thousand, three hundred twenty-eight".