6638480 has 20 divisors (see below), whose sum is σ = 15434652. Its totient is φ = 2655360.

The previous prime is 6638473. The next prime is 6638491. The reversal of 6638480 is 848366.

It can be written as a sum of positive squares in 2 ways, for example, as 2262016 + 4376464 = 1504^2 + 2092^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6638480.

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, 41411 + ... + 41570.

Almost surely, 2^6638480 is an apocalyptic number.

It is an amenable number.

6638480 is an abundant number, since it is smaller than the sum of its proper divisors (8796172).

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

6638480 is a wasteful number, since it uses less digits than its factorization.

6638480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82994 (or 82988 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 6638480 is about 2576.5247912644. The cubic root of 6638480 is about 187.9415843860.

The spelling of 6638480 in words is "six million, six hundred thirty-eight thousand, four hundred eighty".