6447880 has 32 divisors (see below), whose sum is σ = 14581440. Its totient is φ = 2566080.

The previous prime is 6447853. The next prime is 6447899. The reversal of 6447880 is 887446.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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, 12997 + ... + 13483.

It is an arithmetic number, because the mean of its divisors is an integer number (455670).

Almost surely, 2^6447880 is an apocalyptic number.

It is an amenable number.

6447880 is an abundant number, since it is smaller than the sum of its proper divisors (8133560).

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

6447880 is a wasteful number, since it uses less digits than its factorization.

6447880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 6447880 is about 2539.2676109461. The cubic root of 6447880 is about 186.1254020032.

The spelling of 6447880 in words is "six million, four hundred forty-seven thousand, eight hundred eighty".