28364207831 has 4 divisors (see below), whose sum is σ = 28409159664. Its totient is φ = 28319256000.

The previous prime is 28364207803. The next prime is 28364207869. The reversal of 28364207831 is 13870246382.

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 28364207831 - 2³⁴ = 11184338647 is a prime.

It is a super-2 number, since 2×28364207831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28364207891) 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, 22474970 + ... + 22476231.

It is an arithmetic number, because the mean of its divisors is an integer number (7102289916).

Almost surely, 2^28364207831 is an apocalyptic number.

28364207831 is a deficient number, since it is larger than the sum of its proper divisors (44951833).

28364207831 is an equidigital number, since it uses as much as digits as its factorization.

28364207831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44951832.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 28364207831 in words is "twenty-eight billion, three hundred sixty-four million, two hundred seven thousand, eight hundred thirty-one".