6399000 has 160 divisors (see below), whose sum is σ = 22651200. Its totient is φ = 1684800.

The previous prime is 6398999. The next prime is 6399007. The reversal of 6399000 is 9936.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 80961 + ... + 81039.

It is an arithmetic number, because the mean of its divisors is an integer number (141570).

Almost surely, 2^6399000 is an apocalyptic number.

6399000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6399000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11325600).

6399000 is an abundant number, since it is smaller than the sum of its proper divisors (16252200).

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

6399000 is a wasteful number, since it uses less digits than its factorization.

6399000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 6399000 is about 2529.6244780599. The cubic root of 6399000 is about 185.6538828641.

The spelling of 6399000 in words is "six million, three hundred ninety-nine thousand".