28321612718 has 32 divisors (see below), whose sum is σ = 50688543744. Its totient is φ = 11604079872.

The previous prime is 28321612717. The next prime is 28321612721. The reversal of 28321612718 is 81721612382.

It is a super-2 number, since 2×28321612718² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321612717) 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, 627671 + ... + 671277.

It is an arithmetic number, because the mean of its divisors is an integer number (1584016992).

Almost surely, 2^28321612718 is an apocalyptic number.

28321612718 is a deficient number, since it is larger than the sum of its proper divisors (22366931026).

28321612718 is a wasteful number, since it uses less digits than its factorization.

28321612718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45656.

The product of its digits is 64512, while the sum is 41.

The spelling of 28321612718 in words is "twenty-eight billion, three hundred twenty-one million, six hundred twelve thousand, seven hundred eighteen".