6441988 has 24 divisors (see below), whose sum is σ = 13563200. Its totient is φ = 2615328.

The previous prime is 6441977. The next prime is 6441989. The reversal of 6441988 is 8891446.

6441988 is nontrivially palindromic in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 6441988.

It is not an unprimeable number, because it can be changed into a prime (6441989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5523 + ... + 6586.

Almost surely, 2^6441988 is an apocalyptic number.

It is an amenable number.

6441988 is an abundant number, since it is smaller than the sum of its proper divisors (7121212).

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

6441988 is a wasteful number, since it uses less digits than its factorization.

6441988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12139 (or 12137 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 6441988 is about 2538.1071687382. The cubic root of 6441988 is about 186.0686916284.

The spelling of 6441988 in words is "six million, four hundred forty-one thousand, nine hundred eighty-eight".