28484224831 has 4 divisors (see below), whose sum is σ = 29178962064. Its totient is φ = 27789487600.

The previous prime is 28484224817. The next prime is 28484224849. The reversal of 28484224831 is 13842248482.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28484224831 is a prime.

It is a super-2 number, since 2×28484224831² (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 (28484224231) 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, 347368555 + ... + 347368636.

It is an arithmetic number, because the mean of its divisors is an integer number (7294740516).

Almost surely, 2^28484224831 is an apocalyptic number.

28484224831 is a deficient number, since it is larger than the sum of its proper divisors (694737233).

28484224831 is an equidigital number, since it uses as much as digits as its factorization.

28484224831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694737232.

The product of its digits is 786432, while the sum is 46.

The spelling of 28484224831 in words is "twenty-eight billion, four hundred eighty-four million, two hundred twenty-four thousand, eight hundred thirty-one".