6445500 has 48 divisors (see below), whose sum is σ = 18773664. Its totient is φ = 1718400.

The previous prime is 6445493. The next prime is 6445501. The reversal of 6445500 is 55446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649 + ... + 3648.

It is an arithmetic number, because the mean of its divisors is an integer number (391118).

Almost surely, 2^6445500 is an apocalyptic number.

6445500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6445500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9386832).

6445500 is an abundant number, since it is smaller than the sum of its proper divisors (12328164).

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

6445500 is a wasteful number, since it uses less digits than its factorization.

6445500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319 (or 4307 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 6445500 is about 2538.7989286275. The cubic root of 6445500 is about 186.1024987145.

The spelling of 6445500 in words is "six million, four hundred forty-five thousand, five hundred".