28058181823 has 4 divisors (see below), whose sum is σ = 32066493520. Its totient is φ = 24049870128.

The previous prime is 28058181817. The next prime is 28058181829. The reversal of 28058181823 is 32818185082.

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 (28058181817) and next prime (28058181829).

It is a cyclic number.

It is not a de Polignac number, because 28058181823 - 2⁵ = 28058181791 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 (28058181829) 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, 2004155838 + ... + 2004155851.

It is an arithmetic number, because the mean of its divisors is an integer number (8016623380).

Almost surely, 2^28058181823 is an apocalyptic number.

28058181823 is a deficient number, since it is larger than the sum of its proper divisors (4008311697).

28058181823 is an equidigital number, since it uses as much as digits as its factorization.

28058181823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008311696.

The product of its (nonzero) digits is 245760, while the sum is 46.

It can be divided in two parts, 280581 and 81823, that added together give a square (362404 = 602²).

The spelling of 28058181823 in words is "twenty-eight billion, fifty-eight million, one hundred eighty-one thousand, eight hundred twenty-three".