6388424 has 48 divisors (see below), whose sum is σ = 14295600. Its totient is φ = 2667168.

The previous prime is 6388409. The next prime is 6388429. The reversal of 6388424 is 4248836.

It is a super-2 number, since 2×6388424² = 81623922407552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6388429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16667 + ... + 17045.

It is an arithmetic number, because the mean of its divisors is an integer number (297825).

Almost surely, 2^6388424 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 6388424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7147800).

6388424 is an abundant number, since it is smaller than the sum of its proper divisors (7907176).

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

6388424 is a wasteful number, since it uses less digits than its factorization.

6388424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 431 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 6388424 is about 2527.5331847475. The cubic root of 6388424 is about 185.5515461356.

The spelling of 6388424 in words is "six million, three hundred eighty-eight thousand, four hundred twenty-four".