6540198 has 16 divisors (see below), whose sum is σ = 14949120. Its totient is φ = 1868616.

The previous prime is 6540187. The next prime is 6540217. The reversal of 6540198 is 8910456.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77818 + ... + 77901.

It is an arithmetic number, because the mean of its divisors is an integer number (934320).

Almost surely, 2^6540198 is an apocalyptic number.

6540198 is an abundant number, since it is smaller than the sum of its proper divisors (8408922).

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

6540198 is a wasteful number, since it uses less digits than its factorization.

6540198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155731.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 6540198 is about 2557.3810822793. The cubic root of 6540198 is about 187.0094841101.

The spelling of 6540198 in words is "six million, five hundred forty thousand, one hundred ninety-eight".