6447956 has 12 divisors (see below), whose sum is σ = 11302368. Its totient is φ = 3218712.

The previous prime is 6447943. The next prime is 6447967. The reversal of 6447956 is 6597446.

It is a super-2 number, since 2×6447956² = 83152273155872, which contains 22 as substring.

It is a congruent number.

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, 3035 + ... + 4701.

It is an arithmetic number, because the mean of its divisors is an integer number (941864).

Almost surely, 2^6447956 is an apocalyptic number.

It is an amenable number.

6447956 is a deficient number, since it is larger than the sum of its proper divisors (4854412).

6447956 is a wasteful number, since it uses less digits than its factorization.

6447956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638 (or 2636 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 6447956 is about 2539.2825758470. The cubic root of 6447956 is about 186.1261332759.

The spelling of 6447956 in words is "six million, four hundred forty-seven thousand, nine hundred fifty-six".