6390888 has 64 divisors (see below), whose sum is σ = 18480000. Its totient is φ = 1804032.

The previous prime is 6390887. The next prime is 6390893. The reversal of 6390888 is 8880936.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390883) 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, 18138 + ... + 18486.

It is an arithmetic number, because the mean of its divisors is an integer number (288750).

Almost surely, 2^6390888 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 6390888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9240000).

6390888 is an abundant number, since it is smaller than the sum of its proper divisors (12089112).

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

6390888 is a wasteful number, since it uses less digits than its factorization.

6390888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 6390888 is about 2528.0205695366. The cubic root of 6390888 is about 185.5753986665.

It can be divided in two parts, 63 and 90888, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 6390888 in words is "six million, three hundred ninety thousand, eight hundred eighty-eight".