6385340988 has 144 divisors (see below), whose sum is σ = 18153888480. Its totient is φ = 1878815232.

The previous prime is 6385340933. The next prime is 6385341007. The reversal of 6385340988 is 8890435836.

It is a happy number.

It is a super-2 number, since 2×6385340988² = 81545159066065632288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1450006 + ... + 1454402.

It is an arithmetic number, because the mean of its divisors is an integer number (126068670).

Almost surely, 2^6385340988 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 6385340988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9076944240).

6385340988 is an abundant number, since it is smaller than the sum of its proper divisors (11768547492).

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

6385340988 is a wasteful number, since it uses less digits than its factorization.

6385340988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556 (or 4551 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The square root of 6385340988 is about 79908.3286522750. The cubic root of 6385340988 is about 1855.2169267506.

The spelling of 6385340988 in words is "six billion, three hundred eighty-five million, three hundred forty thousand, nine hundred eighty-eight".