6331906728 has 80 divisors (see below), whose sum is σ = 20268816480. Its totient is φ = 1809114912.

The previous prime is 6331906723. The next prime is 6331906729. The reversal of 6331906728 is 8276091336.

6331906728 is a `hidden beast` number, since 633 + 1 + 9 + 0 + 6 + 7 + 2 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (6331906723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 693426 + ... + 702497.

It is an arithmetic number, because the mean of its divisors is an integer number (253360206).

Almost surely, 2^6331906728 is an apocalyptic number.

It is an amenable number.

6331906728 is an abundant number, since it is smaller than the sum of its proper divisors (13936909752).

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

6331906728 is a wasteful number, since it uses less digits than its factorization.

6331906728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395948 (or 1395935 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 6331906728 is about 79573.2789823318. The cubic root of 6331906728 is about 1850.0274384048.

The spelling of 6331906728 in words is "six billion, three hundred thirty-one million, nine hundred six thousand, seven hundred twenty-eight".