6544872 has 24 divisors (see below), whose sum is σ = 17725890. Its totient is φ = 2181600.

The previous prime is 6544861. The next prime is 6544883. The reversal of 6544872 is 2784456.

It is an interprime number because it is at equal distance from previous prime (6544861) and next prime (6544883).

It can be written as a sum of positive squares in only one way, i.e., 6320196 + 224676 = 2514^2 + 474^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45379 + ... + 45522.

Almost surely, 2^6544872 is an apocalyptic number.

It is an amenable number.

6544872 is an abundant number, since it is smaller than the sum of its proper divisors (11181018).

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

6544872 is a wasteful number, since it uses less digits than its factorization.

6544872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90913 (or 90906 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 6544872 is about 2558.2947445515. The cubic root of 6544872 is about 187.0540227305.

The spelling of 6544872 in words is "six million, five hundred forty-four thousand, eight hundred seventy-two".