28686354929 has 8 divisors (see below), whose sum is σ = 29970067392. Its totient is φ = 27405682480.

The previous prime is 28686354911. The next prime is 28686354941. The reversal of 28686354929 is 92945368682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28686354929 is a prime.

It is a super-2 number, since 2×28686354929² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28686354329) 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, 740699 + ... + 778464.

It is an arithmetic number, because the mean of its divisors is an integer number (3746258424).

Almost surely, 2^28686354929 is an apocalyptic number.

It is an amenable number.

28686354929 is a deficient number, since it is larger than the sum of its proper divisors (1283712463).

28686354929 is a wasteful number, since it uses less digits than its factorization.

28686354929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520007.

The product of its digits is 44789760, while the sum is 62.

The spelling of 28686354929 in words is "twenty-eight billion, six hundred eighty-six million, three hundred fifty-four thousand, nine hundred twenty-nine".