6540744 has 32 divisors (see below), whose sum is σ = 18688320. Its totient is φ = 1868736.

The previous prime is 6540739. The next prime is 6540827. The reversal of 6540744 is 4470456.

It is an Ulam number.

It is a congruent number.

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, 19299 + ... + 19634.

It is an arithmetic number, because the mean of its divisors is an integer number (584010).

Almost surely, 2^6540744 is an apocalyptic number.

It is an amenable number.

6540744 is an abundant number, since it is smaller than the sum of its proper divisors (12147576).

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

6540744 is a wasteful number, since it uses less digits than its factorization.

6540744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38949 (or 38945 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 6540744 is about 2557.4878298831. The cubic root of 6540744 is about 187.0146880472.

The spelling of 6540744 in words is "six million, five hundred forty thousand, seven hundred forty-four".