6396390 has 192 divisors, whose sum is σ = 22643712. Its totient is φ = 1209600.

The previous prime is 6396389. The next prime is 6396409. The reversal of 6396390 is 936936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 90055 + ... + 90125.

It is an arithmetic number, because the mean of its divisors is an integer number (117936).

Almost surely, 2^6396390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6396390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11321856).

6396390 is an abundant number, since it is smaller than the sum of its proper divisors (16247322).

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

6396390 is a wasteful number, since it uses less digits than its factorization.

6396390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 6396390 is about 2529.1085385962. The cubic root of 6396390 is about 185.6286381629.

It can be divided in two parts, 6396 and 390, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 6396390 in words is "six million, three hundred ninety-six thousand, three hundred ninety".