6728815830 has 64 divisors (see below), whose sum is σ = 18383251968. Its totient is φ = 1560303360.

The previous prime is 6728815787. The next prime is 6728815837. The reversal of 6728815830 is 385188276.

It is a self number, because there is not a number n which added to its sum of digits gives 6728815830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6728815837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435679 + ... + 450858.

It is an arithmetic number, because the mean of its divisors is an integer number (287238312).

Almost surely, 2^6728815830 is an apocalyptic number.

6728815830 is an abundant number, since it is smaller than the sum of its proper divisors (11654436138).

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

6728815830 is a wasteful number, since it uses less digits than its factorization.

6728815830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886581.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 6728815830 is about 82029.3595610742. The cubic root of 6728815830 is about 1887.9024376459.

The spelling of 6728815830 in words is "six billion, seven hundred twenty-eight million, eight hundred fifteen thousand, eight hundred thirty".