6628940 has 12 divisors (see below), whose sum is σ = 13920816. Its totient is φ = 2651568.

The previous prime is 6628879. The next prime is 6628943. The reversal of 6628940 is 498266.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6628940.

It is not an unprimeable number, because it can be changed into a prime (6628943) 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, 165704 + ... + 165743.

It is an arithmetic number, because the mean of its divisors is an integer number (1160068).

Almost surely, 2^6628940 is an apocalyptic number.

It is an amenable number.

6628940 is an abundant number, since it is smaller than the sum of its proper divisors (7291876).

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

6628940 is a wasteful number, since it uses less digits than its factorization.

6628940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331456 (or 331454 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6628940 is about 2574.6727947450. The cubic root of 6628940 is about 187.8515124480.

The spelling of 6628940 in words is "six million, six hundred twenty-eight thousand, nine hundred forty".