28807312743 has 32 divisors (see below), whose sum is σ = 48059136000. Its totient is φ = 16895779200.

The previous prime is 28807312733. The next prime is 28807312747. The reversal of 28807312743 is 34721370882.

It is not a de Polignac number, because 28807312743 - 2¹³ = 28807304551 is a prime.

It is a super-2 number, since 2×28807312743² (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 (28807312747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1555218 + ... + 1573631.

It is an arithmetic number, because the mean of its divisors is an integer number (1501848000).

Almost surely, 2^28807312743 is an apocalyptic number.

28807312743 is a deficient number, since it is larger than the sum of its proper divisors (19251823257).

28807312743 is a wasteful number, since it uses less digits than its factorization.

28807312743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128900 (or 3128894 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 28807312743 in words is "twenty-eight billion, eight hundred seven million, three hundred twelve thousand, seven hundred forty-three".