728279972827 has 16 divisors (see below), whose sum is σ = 817031318400. Its totient is φ = 643538146240.

The previous prime is 728279972813. The next prime is 728279972843.

728279972827 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-728279972827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728279972857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6246493 + ... + 6362014.

It is an arithmetic number, because the mean of its divisors is an integer number (51064457400).

Almost surely, 2^728279972827 is an apocalyptic number.

728279972827 is a deficient number, since it is larger than the sum of its proper divisors (88751345573).

728279972827 is a wasteful number, since it uses less digits than its factorization.

728279972827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12608666.

The product of its digits is 199148544, while the sum is 70.

The spelling of 728279972827 in words is "seven hundred twenty-eight billion, two hundred seventy-nine million, nine hundred seventy-two thousand, eight hundred twenty-seven".