6549990 has 32 divisors (see below), whose sum is σ = 16229376. Its totient is φ = 1690080.

The previous prime is 6549979. The next prime is 6550001. The reversal of 6549990 is 999456.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6549979) and next prime (6550001).

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, 2592 + ... + 4451.

It is an arithmetic number, because the mean of its divisors is an integer number (507168).

Almost surely, 2^6549990 is an apocalyptic number.

6549990 is an abundant number, since it is smaller than the sum of its proper divisors (9679386).

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

6549990 is a wasteful number, since it uses less digits than its factorization.

6549990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 6549990 is about 2559.2948247515. The cubic root of 6549990 is about 187.1027679188.

The spelling of 6549990 in words is "six million, five hundred forty-nine thousand, nine hundred ninety".