6640048 has 20 divisors (see below), whose sum is σ = 12929728. Its totient is φ = 3303360.

The previous prime is 6640027. The next prime is 6640061. The reversal of 6640048 is 8400466.

It is a junction number, because it is equal to n+sod(n) for n = 6639998 and 6640025.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2638 + ... + 4498.

Almost surely, 2^6640048 is an apocalyptic number.

It is an amenable number.

6640048 is a deficient number, since it is larger than the sum of its proper divisors (6289680).

6640048 is a wasteful number, since it uses less digits than its factorization.

6640048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 6640048 is about 2576.8290591345. The cubic root of 6640048 is about 187.9563804038.

The spelling of 6640048 in words is "six million, six hundred forty thousand, forty-eight".