28812476431 has 4 divisors (see below), whose sum is σ = 28949028664. Its totient is φ = 28675924200.

The previous prime is 28812476393. The next prime is 28812476437. The reversal of 28812476431 is 13467421882.

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-28812476431 is a prime.

It is a super-2 number, since 2×28812476431² (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 (28812476437) 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, 68275800 + ... + 68276221.

It is an arithmetic number, because the mean of its divisors is an integer number (7237257166).

Almost surely, 2^28812476431 is an apocalyptic number.

28812476431 is a deficient number, since it is larger than the sum of its proper divisors (136552233).

28812476431 is a wasteful number, since it uses less digits than its factorization.

28812476431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136552232.

The product of its digits is 516096, while the sum is 46.

The spelling of 28812476431 in words is "twenty-eight billion, eight hundred twelve million, four hundred seventy-six thousand, four hundred thirty-one".