6840455328 has 144 divisors (see below), whose sum is σ = 22326071040. Its totient is φ = 1946101248.

The previous prime is 6840455299. The next prime is 6840455329. The reversal of 6840455328 is 8235540486.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (6840455329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474726 + ... + 488922.

It is an arithmetic number, because the mean of its divisors is an integer number (155042160).

Almost surely, 2^6840455328 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 6840455328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11163035520).

6840455328 is an abundant number, since it is smaller than the sum of its proper divisors (15485615712).

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

6840455328 is a wasteful number, since it uses less digits than its factorization.

6840455328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14459 (or 14448 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The square root of 6840455328 is about 82707.0452138148. The cubic root of 6840455328 is about 1898.2861117064.

The spelling of 6840455328 in words is "six billion, eight hundred forty million, four hundred fifty-five thousand, three hundred twenty-eight".