6447272 has 32 divisors (see below), whose sum is σ = 13305600. Its totient is φ = 2910144.

The previous prime is 6447271. The next prime is 6447277. The reversal of 6447272 is 2727446.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁴ + 4⁶ + 4¹¹ + 7 + 2¹⁵ + 7⁶ + 2²¹ .

It is not an unprimeable number, because it can be changed into a prime (6447271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4229 + ... + 5547.

It is an arithmetic number, because the mean of its divisors is an integer number (415800).

Almost surely, 2^6447272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6447272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6652800).

6447272 is an abundant number, since it is smaller than the sum of its proper divisors (6858328).

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

6447272 is a wasteful number, since it uses less digits than its factorization.

6447272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1381 counting only the distinct ones).

The product of its digits is 18816, while the sum is 32.

The square root of 6447272 is about 2539.1478885642. The cubic root of 6447272 is about 186.1195516151.

The spelling of 6447272 in words is "six million, four hundred forty-seven thousand, two hundred seventy-two".