28620584623 has 4 divisors (see below), whose sum is σ = 29229533280. Its totient is φ = 28011635968.

The previous prime is 28620584611. The next prime is 28620584627. The reversal of 28620584623 is 32648502682.

It is a happy number.

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-28620584623 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 (28620584627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304474258 + ... + 304474351.

It is an arithmetic number, because the mean of its divisors is an integer number (7307383320).

Almost surely, 2^28620584623 is an apocalyptic number.

28620584623 is a deficient number, since it is larger than the sum of its proper divisors (608948657).

28620584623 is an equidigital number, since it uses as much as digits as its factorization.

28620584623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608948656.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 28620584623 in words is "twenty-eight billion, six hundred twenty million, five hundred eighty-four thousand, six hundred twenty-three".