28336683657 has 8 divisors (see below), whose sum is σ = 39770784160. Its totient is φ = 17896852800.

The previous prime is 28336683647. The next prime is 28336683673. The reversal of 28336683657 is 75638663382.

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

It is not a de Polignac number, because 28336683657 - 2²⁴ = 28319906441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 497134801 = 28336683657 / (2 + 8 + 3 + 3 + 6 + 6 + 8 + 3 + 6 + 5 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28336683597 and 28336683606.

It is not an unprimeable number, because it can be changed into a prime (28336683637) 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, 248567344 + ... + 248567457.

It is an arithmetic number, because the mean of its divisors is an integer number (4971348020).

Almost surely, 2^28336683657 is an apocalyptic number.

It is an amenable number.

28336683657 is a deficient number, since it is larger than the sum of its proper divisors (11434100503).

28336683657 is a wasteful number, since it uses less digits than its factorization.

28336683657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497134823.

The product of its digits is 26127360, while the sum is 57.

The spelling of 28336683657 in words is "twenty-eight billion, three hundred thirty-six million, six hundred eighty-three thousand, six hundred fifty-seven".