28697712559 has 8 divisors (see below), whose sum is σ = 30306229632. Its totient is φ = 27119261400.

The previous prime is 28697712539. The next prime is 28697712577. The reversal of 28697712559 is 95521779682.

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 28697712559 - 2⁷ = 28697712431 is a prime.

It is a super-2 number, since 2×28697712559² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28697712497 and 28697712506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28697712539) 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, 7514517 + ... + 7518334.

It is an arithmetic number, because the mean of its divisors is an integer number (3788278704).

Almost surely, 2^28697712559 is an apocalyptic number.

28697712559 is a deficient number, since it is larger than the sum of its proper divisors (1608517073).

28697712559 is a wasteful number, since it uses less digits than its factorization.

28697712559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15032957.

The product of its digits is 19051200, while the sum is 61.

The spelling of 28697712559 in words is "twenty-eight billion, six hundred ninety-seven million, seven hundred twelve thousand, five hundred fifty-nine".