28838623783 has 4 divisors (see below), whose sum is σ = 28842210280. Its totient is φ = 28835037288.

The previous prime is 28838623777. The next prime is 28838623789. The reversal of 28838623783 is 38732683882.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (28838623777) and next prime (28838623789).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28838623783 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 (28838623789) 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, 1781160 + ... + 1797277.

It is an arithmetic number, because the mean of its divisors is an integer number (7210552570).

Almost surely, 2^28838623783 is an apocalyptic number.

28838623783 is a deficient number, since it is larger than the sum of its proper divisors (3586497).

28838623783 is an equidigital number, since it uses as much as digits as its factorization.

28838623783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586496.

The product of its digits is 18579456, while the sum is 58.

The spelling of 28838623783 in words is "twenty-eight billion, eight hundred thirty-eight million, six hundred twenty-three thousand, seven hundred eighty-three".