6445530 has 96 divisors (see below), whose sum is σ = 20651904. Its totient is φ = 1358208.

The previous prime is 6445529. The next prime is 6445547. The reversal of 6445530 is 355446.

It is a super-3 number, since 3×6445530³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6445494 and 6445503.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7797 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (215124).

Almost surely, 2^6445530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6445530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10325952).

6445530 is an abundant number, since it is smaller than the sum of its proper divisors (14206374).

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

6445530 is a wasteful number, since it uses less digits than its factorization.

6445530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 6445530 is about 2538.8048369262. The cubic root of 6445530 is about 186.1027874465.

The spelling of 6445530 in words is "six million, four hundred forty-five thousand, five hundred thirty".