6447972 has 12 divisors (see below), whose sum is σ = 15045296. Its totient is φ = 2149320.

The previous prime is 6447967. The next prime is 6447983. The reversal of 6447972 is 2797446.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 6447972.

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, 268654 + ... + 268677.

Almost surely, 2^6447972 is an apocalyptic number.

It is an amenable number.

6447972 is an abundant number, since it is smaller than the sum of its proper divisors (8597324).

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

6447972 is a wasteful number, since it uses less digits than its factorization.

6447972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537338 (or 537336 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 6447972 is about 2539.2857263412. The cubic root of 6447972 is about 186.1262872273.

The spelling of 6447972 in words is "six million, four hundred forty-seven thousand, nine hundred seventy-two".