6620944 has 20 divisors (see below), whose sum is σ = 13994640. Its totient is φ = 3009440.

The previous prime is 6620927. The next prime is 6620947. The reversal of 6620944 is 4490266.

It is a super-2 number, since 2×6620944² = 87673798902272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6620947) 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, 18634 + ... + 18985.

It is an arithmetic number, because the mean of its divisors is an integer number (699732).

Almost surely, 2^6620944 is an apocalyptic number.

It is an amenable number.

6620944 is an abundant number, since it is smaller than the sum of its proper divisors (7373696).

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

6620944 is a wasteful number, since it uses less digits than its factorization.

6620944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37638 (or 37632 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 6620944 is about 2573.1195075239. The cubic root of 6620944 is about 187.7759515972.

The spelling of 6620944 in words is "six million, six hundred twenty thousand, nine hundred forty-four".