28862431431 has 4 divisors (see below), whose sum is σ = 38483241912. Its totient is φ = 19241620952.

The previous prime is 28862431421. The next prime is 28862431439. The reversal of 28862431431 is 13413426882.

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-28862431431 is a prime.

It is a super-2 number, since 2×28862431431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28862431439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4810405236 + ... + 4810405241.

It is an arithmetic number, because the mean of its divisors is an integer number (9620810478).

Almost surely, 2^28862431431 is an apocalyptic number.

28862431431 is a deficient number, since it is larger than the sum of its proper divisors (9620810481).

28862431431 is an equidigital number, since it uses as much as digits as its factorization.

28862431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9620810480.

The product of its digits is 221184, while the sum is 42.

The spelling of 28862431431 in words is "twenty-eight billion, eight hundred sixty-two million, four hundred thirty-one thousand, four hundred thirty-one".