6821744928 has 48 divisors (see below), whose sum is σ = 18484736256. Its totient is φ = 2200561920.

The previous prime is 6821744911. The next prime is 6821744939. The reversal of 6821744928 is 8294471286.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143151 + ... + 1149102.

It is an arithmetic number, because the mean of its divisors is an integer number (385098672).

Almost surely, 2^6821744928 is an apocalyptic number.

It is an amenable number.

6821744928 is an abundant number, since it is smaller than the sum of its proper divisors (11662991328).

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

6821744928 is a wasteful number, since it uses less digits than its factorization.

6821744928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292297 (or 2292289 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 6821744928 is about 82593.8552678103. The cubic root of 6821744928 is about 1896.5537647893.

The spelling of 6821744928 in words is "six billion, eight hundred twenty-one million, seven hundred forty-four thousand, nine hundred twenty-eight".