28496636821 has 8 divisors (see below), whose sum is σ = 29490912000. Its totient is φ = 27503137200.

The previous prime is 28496636797. The next prime is 28496636873. The reversal of 28496636821 is 12863669482.

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 28496636821 - 2⁵ = 28496636789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28496636321) 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, 118621 + ... + 266578.

It is an arithmetic number, because the mean of its divisors is an integer number (3686364000).

Almost surely, 2^28496636821 is an apocalyptic number.

It is an amenable number.

28496636821 is a deficient number, since it is larger than the sum of its proper divisors (994275179).

28496636821 is a wasteful number, since it uses less digits than its factorization.

28496636821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387779.

The product of its digits is 5971968, while the sum is 55.

The spelling of 28496636821 in words is "twenty-eight billion, four hundred ninety-six million, six hundred thirty-six thousand, eight hundred twenty-one".