6545440 has 48 divisors (see below), whose sum is σ = 16873920. Its totient is φ = 2379520.

The previous prime is 6545437. The next prime is 6545467. The reversal of 6545440 is 445456.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6545399 and 6545408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100 + ... + 3619.

It is an arithmetic number, because the mean of its divisors is an integer number (351540).

Almost surely, 2^6545440 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 6545440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8436960).

6545440 is an abundant number, since it is smaller than the sum of its proper divisors (10328480).

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

6545440 is a wasteful number, since it uses less digits than its factorization.

6545440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745 (or 3737 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 6545440 is about 2558.4057535895. The cubic root of 6545440 is about 187.0594337664.

The spelling of 6545440 in words is "six million, five hundred forty-five thousand, four hundred forty".