6540990 has 32 divisors (see below), whose sum is σ = 16035840. Its totient is φ = 1706784.

The previous prime is 6540983. The next prime is 6541021. The reversal of 6540990 is 990456.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 910 + ... + 3729.

It is an arithmetic number, because the mean of its divisors is an integer number (501120).

Almost surely, 2^6540990 is an apocalyptic number.

6540990 is an abundant number, since it is smaller than the sum of its proper divisors (9494850).

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

6540990 is a wasteful number, since it uses less digits than its factorization.

6540990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 6540990 is about 2557.5359235014. The cubic root of 6540990 is about 187.0170325836.

The spelling of 6540990 in words is "six million, five hundred forty thousand, nine hundred ninety".