6638748 has 12 divisors (see below), whose sum is σ = 15490440. Its totient is φ = 2212912.

The previous prime is 6638741. The next prime is 6638773. The reversal of 6638748 is 8478366.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638741) by changing a digit.

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, 276603 + ... + 276626.

It is an arithmetic number, because the mean of its divisors is an integer number (1290870).

Almost surely, 2^6638748 is an apocalyptic number.

It is an amenable number.

6638748 is an abundant number, since it is smaller than the sum of its proper divisors (8851692).

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

6638748 is a wasteful number, since it uses less digits than its factorization.

6638748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553236 (or 553234 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 6638748 is about 2576.5767987778. The cubic root of 6638748 is about 187.9441134623.

The spelling of 6638748 in words is "six million, six hundred thirty-eight thousand, seven hundred forty-eight".