6499988 has 12 divisors (see below), whose sum is σ = 12409152. Its totient is φ = 2954520.

The previous prime is 6499949. The next prime is 6499991. The reversal of 6499988 is 8899946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73820 + ... + 73907.

It is an arithmetic number, because the mean of its divisors is an integer number (1034096).

Almost surely, 2^6499988 is an apocalyptic number.

It is an amenable number.

6499988 is a deficient number, since it is larger than the sum of its proper divisors (5909164).

6499988 is a wasteful number, since it uses less digits than its factorization.

6499988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147742 (or 147740 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 53.

The square root of 6499988 is about 2549.5074034017. The cubic root of 6499988 is about 186.6254429943.

It can be divided in two parts, 6 and 499988, that added together give a palindrome (499994).

The spelling of 6499988 in words is "six million, four hundred ninety-nine thousand, nine hundred eighty-eight".