28076857823 has 4 divisors (see below), whose sum is σ = 32087837520. Its totient is φ = 24065878128.

The previous prime is 28076857817. The next prime is 28076857903. The reversal of 28076857823 is 32875867082.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28076857823 - 2²² = 28072663519 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 (28076853823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005489838 + ... + 2005489851.

It is an arithmetic number, because the mean of its divisors is an integer number (8021959380).

Almost surely, 2^28076857823 is an apocalyptic number.

28076857823 is a deficient number, since it is larger than the sum of its proper divisors (4010979697).

28076857823 is an equidigital number, since it uses as much as digits as its factorization.

28076857823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010979696.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 28076857823 in words is "twenty-eight billion, seventy-six million, eight hundred fifty-seven thousand, eight hundred twenty-three".