28945499831 has 4 divisors (see below), whose sum is σ = 29879225664. Its totient is φ = 28011774000.

The previous prime is 28945499801. The next prime is 28945499833. The reversal of 28945499831 is 13899454982.

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 28945499831 - 2¹⁰ = 28945498807 is a prime.

It is a super-2 number, since 2×28945499831² (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 (28945499833) 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, 466862870 + ... + 466862931.

It is an arithmetic number, because the mean of its divisors is an integer number (7469806416).

Almost surely, 2^28945499831 is an apocalyptic number.

28945499831 is a deficient number, since it is larger than the sum of its proper divisors (933725833).

28945499831 is an equidigital number, since it uses as much as digits as its factorization.

28945499831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933725832.

The product of its digits is 22394880, while the sum is 62.

The spelling of 28945499831 in words is "twenty-eight billion, nine hundred forty-five million, four hundred ninety-nine thousand, eight hundred thirty-one".