6540444 has 36 divisors (see below), whose sum is σ = 17506944. Its totient is φ = 2051712.

The previous prime is 6540433. The next prime is 6540451. The reversal of 6540444 is 4440456.

6540444 is a `hidden beast` number, since 654 + 0 + 4 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4732 + ... + 5955.

It is an arithmetic number, because the mean of its divisors is an integer number (486304).

Almost surely, 2^6540444 is an apocalyptic number.

It is an amenable number.

6540444 is an abundant number, since it is smaller than the sum of its proper divisors (10966500).

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

6540444 is a wasteful number, since it uses less digits than its factorization.

6540444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10714 (or 10709 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 6540444 is about 2557.4291779050. The cubic root of 6540444 is about 187.0118287769.

The spelling of 6540444 in words is "six million, five hundred forty thousand, four hundred forty-four".