728286982931 has 4 divisors (see below), whose sum is σ = 753400327200. Its totient is φ = 703173638664.

The previous prime is 728286982919. The next prime is 728286982933. The reversal of 728286982931 is 139289682827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728286982931 is a prime.

It is a super-2 number, since 2×728286982931² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728286982933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12556672091 + ... + 12556672148.

It is an arithmetic number, because the mean of its divisors is an integer number (188350081800).

Almost surely, 2^728286982931 is an apocalyptic number.

728286982931 is a deficient number, since it is larger than the sum of its proper divisors (25113344269).

728286982931 is a wasteful number, since it uses less digits than its factorization.

728286982931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25113344268.

The product of its digits is 41803776, while the sum is 65.

The spelling of 728286982931 in words is "seven hundred twenty-eight billion, two hundred eighty-six million, nine hundred eighty-two thousand, nine hundred thirty-one".