728997799827 has 8 divisors (see below), whose sum is σ = 1060360436160. Its totient is φ = 441816848360.

The previous prime is 728997799813. The next prime is 728997799841.

It is a happy number.

728997799827 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (728997799813) and next prime (728997799841).

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

It is a cyclic number.

It is not a de Polignac number, because 728997799827 - 2⁴ = 728997799811 is a prime.

It is a super-2 number, since 2×728997799827² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 728997799827.

It is not an unprimeable number, because it can be changed into a prime (728997799877) 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, 11045421177 + ... + 11045421242.

It is an arithmetic number, because the mean of its divisors is an integer number (132545054520).

Almost surely, 2^728997799827 is an apocalyptic number.

728997799827 is a deficient number, since it is larger than the sum of its proper divisors (331362636333).

728997799827 is a wasteful number, since it uses less digits than its factorization.

728997799827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22090842433.

The product of its digits is 4032758016, while the sum is 84.

The spelling of 728997799827 in words is "seven hundred twenty-eight billion, nine hundred ninety-seven million, seven hundred ninety-nine thousand, eight hundred twenty-seven".