6398660 has 24 divisors (see below), whose sum is σ = 13485696. Its totient is φ = 2550240.

The previous prime is 6398633. The next prime is 6398671. The reversal of 6398660 is 668936.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8915 + ... + 9605.

It is an arithmetic number, because the mean of its divisors is an integer number (561904).

Almost surely, 2^6398660 is an apocalyptic number.

It is an amenable number.

6398660 is an abundant number, since it is smaller than the sum of its proper divisors (7087036).

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

6398660 is a wasteful number, since it uses less digits than its factorization.

6398660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6398660 is about 2529.5572735165. The cubic root of 6398660 is about 185.6505946712.

It can be divided in two parts, 63986 and 60, that added together give a palindrome (64046).

The spelling of 6398660 in words is "six million, three hundred ninety-eight thousand, six hundred sixty".