6638860 has 12 divisors (see below), whose sum is σ = 13941648. Its totient is φ = 2655536.

The previous prime is 6638851. The next prime is 6638893. The reversal of 6638860 is 688366.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165952 + ... + 165991.

It is an arithmetic number, because the mean of its divisors is an integer number (1161804).

Almost surely, 2^6638860 is an apocalyptic number.

It is an amenable number.

6638860 is an abundant number, since it is smaller than the sum of its proper divisors (7302788).

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

6638860 is a wasteful number, since it uses less digits than its factorization.

6638860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331952 (or 331950 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6638860 is about 2576.5985329500. The cubic root of 6638860 is about 187.9451703695.

The spelling of 6638860 in words is "six million, six hundred thirty-eight thousand, eight hundred sixty".