6649748 has 48 divisors (see below), whose sum is σ = 14106624. Its totient is φ = 2682720.

The previous prime is 6649733. The next prime is 6649801. The reversal of 6649748 is 8479466.

It is an Ulam number.

Its product of digits (290304) is a multiple of the sum of its prime factors (252).

It is a junction number, because it is equal to n+sod(n) for n = 6649699 and 6649708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40715 + ... + 40877.

It is an arithmetic number, because the mean of its divisors is an integer number (293888).

Almost surely, 2^6649748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6649748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7053312).

6649748 is an abundant number, since it is smaller than the sum of its proper divisors (7456876).

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

6649748 is a wasteful number, since it uses less digits than its factorization.

6649748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 250 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 6649748 is about 2578.7105304784. The cubic root of 6649748 is about 188.0478601554.

The spelling of 6649748 in words is "six million, six hundred forty-nine thousand, seven hundred forty-eight".