6447156 has 24 divisors (see below), whose sum is σ = 15835680. Its totient is φ = 2035872.

The previous prime is 6447149. The next prime is 6447167. The reversal of 6447156 is 6517446.

It is a congruent number.

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, 13911 + ... + 14366.

It is an arithmetic number, because the mean of its divisors is an integer number (659820).

Almost surely, 2^6447156 is an apocalyptic number.

It is an amenable number.

6447156 is an abundant number, since it is smaller than the sum of its proper divisors (9388524).

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

6447156 is a wasteful number, since it uses less digits than its factorization.

6447156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28303 (or 28301 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 6447156 is about 2539.1250461527. The cubic root of 6447156 is about 186.1184353808.

The spelling of 6447156 in words is "six million, four hundred forty-seven thousand, one hundred fifty-six".