6389988 has 24 divisors (see below), whose sum is σ = 16265760. Its totient is φ = 1936320.

The previous prime is 6389983. The next prime is 6389989. The reversal of 6389988 is 8899836.

It is a self number, because there is not a number n which added to its sum of digits gives 6389988.

It is not an unprimeable number, because it can be changed into a prime (6389983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24073 + ... + 24336.

It is an arithmetic number, because the mean of its divisors is an integer number (677740).

Almost surely, 2^6389988 is an apocalyptic number.

It is an amenable number.

6389988 is an abundant number, since it is smaller than the sum of its proper divisors (9875772).

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

6389988 is a wasteful number, since it uses less digits than its factorization.

6389988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48427 (or 48425 counting only the distinct ones).

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

The square root of 6389988 is about 2527.8425583885. The cubic root of 6389988 is about 185.5666870081.

The spelling of 6389988 in words is "six million, three hundred eighty-nine thousand, nine hundred eighty-eight".