6828728731 has 8 divisors (see below), whose sum is σ = 7477014528. Its totient is φ = 6185025000.

The previous prime is 6828728729. The next prime is 6828728743. The reversal of 6828728731 is 1378278286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6828728731 - 2¹ = 6828728729 is a prime.

It is a super-2 number, since 2×6828728731² = 93263072163169740722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6828728771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142395 + ... + 1148356.

It is an arithmetic number, because the mean of its divisors is an integer number (934626816).

Almost surely, 2^6828728731 is an apocalyptic number.

6828728731 is a deficient number, since it is larger than the sum of its proper divisors (648285797).

6828728731 is a wasteful number, since it uses less digits than its factorization.

6828728731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291033.

The product of its digits is 1806336, while the sum is 52.

The square root of 6828728731 is about 82636.1224344415. The cubic root of 6828728731 is about 1897.2007468857.

The spelling of 6828728731 in words is "six billion, eight hundred twenty-eight million, seven hundred twenty-eight thousand, seven hundred thirty-one".