6445472 has 24 divisors (see below), whose sum is σ = 13843872. Its totient is φ = 2929600.

The previous prime is 6445463. The next prime is 6445493. The reversal of 6445472 is 2745446.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 8804 + ... + 9507.

It is an arithmetic number, because the mean of its divisors is an integer number (576828).

Almost surely, 2^6445472 is an apocalyptic number.

It is an amenable number.

6445472 is an abundant number, since it is smaller than the sum of its proper divisors (7398400).

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

6445472 is a wasteful number, since it uses less digits than its factorization.

6445472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18332 (or 18324 counting only the distinct ones).

The product of its digits is 26880, while the sum is 32.

The square root of 6445472 is about 2538.7934142029. The cubic root of 6445472 is about 186.1022292305.

It can be divided in two parts, 644 and 5472, that added together give a palindrome (6116).

The spelling of 6445472 in words is "six million, four hundred forty-five thousand, four hundred seventy-two".