6390684 has 48 divisors (see below), whose sum is σ = 16934400. Its totient is φ = 2083248.

The previous prime is 6390679. The next prime is 6390689. The reversal of 6390684 is 4860936.

It is an interprime number because it is at equal distance from previous prime (6390679) and next prime (6390689).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4447 + ... + 5705.

It is an arithmetic number, because the mean of its divisors is an integer number (352800).

Almost surely, 2^6390684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6390684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8467200).

6390684 is an abundant number, since it is smaller than the sum of its proper divisors (10543716).

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

6390684 is a wasteful number, since it uses less digits than its factorization.

6390684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6390684 is about 2527.9802214416. The cubic root of 6390684 is about 185.5734240956.

The spelling of 6390684 in words is "six million, three hundred ninety thousand, six hundred eighty-four".