28366755827 has 4 divisors (see below), whose sum is σ = 28409801640. Its totient is φ = 28323710016.

The previous prime is 28366755799. The next prime is 28366755839. The reversal of 28366755827 is 72855766382.

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 28366755827 - 2¹² = 28366751731 is a prime.

It is a super-2 number, since 2×28366755827² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28366755427) 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, 21521918 + ... + 21523235.

It is an arithmetic number, because the mean of its divisors is an integer number (7102450410).

Almost surely, 2^28366755827 is an apocalyptic number.

28366755827 is a deficient number, since it is larger than the sum of its proper divisors (43045813).

28366755827 is an equidigital number, since it uses as much as digits as its factorization.

28366755827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43045812.

The product of its digits is 33868800, while the sum is 59.

The spelling of 28366755827 in words is "twenty-eight billion, three hundred sixty-six million, seven hundred fifty-five thousand, eight hundred twenty-seven".