6445332 has 72 divisors (see below), whose sum is σ = 17836000. Its totient is φ = 2029536.

The previous prime is 6445319. The next prime is 6445381. The reversal of 6445332 is 2335446.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6445296 and 6445305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18294 + ... + 18642.

Almost surely, 2^6445332 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 6445332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8918000).

6445332 is an abundant number, since it is smaller than the sum of its proper divisors (11390668).

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

6445332 is a wasteful number, since it uses less digits than its factorization.

6445332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 373 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 6445332 is about 2538.7658419004. The cubic root of 6445332 is about 186.1008817988.

The spelling of 6445332 in words is "six million, four hundred forty-five thousand, three hundred thirty-two".