6386869040 has 20 divisors (see below), whose sum is σ = 14849470704. Its totient is φ = 2554747584.

The previous prime is 6386869033. The next prime is 6386869081. The reversal of 6386869040 is 409686836.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6386869040² = 81584192268221043200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6386869040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39917852 + ... + 39918011.

Almost surely, 2^6386869040 is an apocalyptic number.

It is an amenable number.

6386869040 is an abundant number, since it is smaller than the sum of its proper divisors (8462601664).

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

6386869040 is a wasteful number, since it uses less digits than its factorization.

6386869040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79835876 (or 79835870 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The square root of 6386869040 is about 79917.8893615191. The cubic root of 6386869040 is about 1855.3649032819.

The spelling of 6386869040 in words is "six billion, three hundred eighty-six million, eight hundred sixty-nine thousand, forty".