6870944640 has 384 divisors, whose sum is σ = 25674624000. Its totient is φ = 1558351872.

The previous prime is 6870944603. The next prime is 6870944669. The reversal of 6870944640 is 464490786.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6870944640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18721737 + ... + 18722103.

It is an arithmetic number, because the mean of its divisors is an integer number (66861000).

Almost surely, 2^6870944640 is an apocalyptic number.

6870944640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6870944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12837312000).

6870944640 is an abundant number, since it is smaller than the sum of its proper divisors (18803679360).

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

6870944640 is a wasteful number, since it uses less digits than its factorization.

6870944640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 6870944640 is about 82891.1614106112. The cubic root of 6870944640 is about 1901.1022819036.

It can be divided in two parts, 6870 and 944640, that added together give a triangular number (951510 = T₁₃₇₉).

The spelling of 6870944640 in words is "six billion, eight hundred seventy million, nine hundred forty-four thousand, six hundred forty".