6540478 has 16 divisors (see below), whose sum is σ = 11872224. Its totient is φ = 2638080.

The previous prime is 6540467. The next prime is 6540493. The reversal of 6540478 is 8740456.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 13503 + ... + 13978.

It is an arithmetic number, because the mean of its divisors is an integer number (742014).

Almost surely, 2^6540478 is an apocalyptic number.

6540478 is a deficient number, since it is larger than the sum of its proper divisors (5331746).

6540478 is a wasteful number, since it uses less digits than its factorization.

6540478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27507.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 6540478 is about 2557.4358251968. The cubic root of 6540478 is about 187.0121528320.

The spelling of 6540478 in words is "six million, five hundred forty thousand, four hundred seventy-eight".