28936808924623 has 4 divisors (see below), whose sum is σ = 28965374383608. Its totient is φ = 28908243465640.

The previous prime is 28936808924593. The next prime is 28936808924633. The reversal of 28936808924623 is 32642980863982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28936808924623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28936808924633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14282727973 + ... + 14282729998.

It is an arithmetic number, because the mean of its divisors is an integer number (7241343595902).

Almost surely, 2^{28936808924623} is an apocalyptic number.

28936808924623 is a deficient number, since it is larger than the sum of its proper divisors (28565458985).

28936808924623 is a wasteful number, since it uses less digits than its factorization.

28936808924623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28565458984.

The product of its (nonzero) digits is 429981696, while the sum is 70.

The spelling of 28936808924623 in words is "twenty-eight trillion, nine hundred thirty-six billion, eight hundred eight million, nine hundred twenty-four thousand, six hundred twenty-three".