6388481 has 16 divisors (see below), whose sum is σ = 7464960. Its totient is φ = 5402880.

The previous prime is 6388471. The next prime is 6388483. The reversal of 6388481 is 1848836.

6388481 = 605² + 606² + ... + 621².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6388481 is a prime.

It is a super-2 number, since 2×6388481² = 81625378974722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6388483) 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, 23615 + ... + 23883.

It is an arithmetic number, because the mean of its divisors is an integer number (466560).

Almost surely, 2^6388481 is an apocalyptic number.

It is an amenable number.

6388481 is a deficient number, since it is larger than the sum of its proper divisors (1076479).

6388481 is a wasteful number, since it uses less digits than its factorization.

6388481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424.

The product of its digits is 36864, while the sum is 38.

The square root of 6388481 is about 2527.5444605387. The cubic root of 6388481 is about 185.5520979883.

It can be divided in two parts, 638 and 8481, that added together give a palindrome (9119).

The spelling of 6388481 in words is "six million, three hundred eighty-eight thousand, four hundred eighty-one".