6638880 has 48 divisors (see below), whose sum is σ = 20913984. Its totient is φ = 1770240.

The previous prime is 6638851. The next prime is 6638893. The reversal of 6638880 is 888366.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6436 + ... + 7395.

It is an arithmetic number, because the mean of its divisors is an integer number (435708).

Almost surely, 2^6638880 is an apocalyptic number.

6638880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6638880 is an abundant number, since it is smaller than the sum of its proper divisors (14275104).

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

6638880 is a wasteful number, since it uses less digits than its factorization.

6638880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13849 (or 13841 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 6638880 is about 2576.6024140329. The cubic root of 6638880 is about 187.9453591017.

The spelling of 6638880 in words is "six million, six hundred thirty-eight thousand, eight hundred eighty".