6398988 has 12 divisors (see below), whose sum is σ = 14931000. Its totient is φ = 2132992.

The previous prime is 6398983. The next prime is 6398999. The reversal of 6398988 is 8898936.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6398988.

It is not an unprimeable number, because it can be changed into a prime (6398981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266613 + ... + 266636.

It is an arithmetic number, because the mean of its divisors is an integer number (1244250).

Almost surely, 2^6398988 is an apocalyptic number.

It is an amenable number.

6398988 is an abundant number, since it is smaller than the sum of its proper divisors (8532012).

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

6398988 is a wasteful number, since it uses less digits than its factorization.

6398988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533256 (or 533254 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The square root of 6398988 is about 2529.6221061653. The cubic root of 6398988 is about 185.6537668122.

The spelling of 6398988 in words is "six million, three hundred ninety-eight thousand, nine hundred eighty-eight".