28731430143 has 48 divisors (see below), whose sum is σ = 45940055616. Its totient is φ = 17188485120.

The previous prime is 28731430139. The next prime is 28731430151. The reversal of 28731430143 is 34103413782.

28731430143 is a `hidden beast` number, since 2 + 87 + 3 + 1 + 430 + 143 = 666.

It is not a de Polignac number, because 28731430143 - 2² = 28731430139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28731430098 and 28731430107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28731430153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7344358 + ... + 7348268.

It is an arithmetic number, because the mean of its divisors is an integer number (957084492).

Almost surely, 2^28731430143 is an apocalyptic number.

28731430143 is a deficient number, since it is larger than the sum of its proper divisors (17208625473).

28731430143 is a wasteful number, since it uses less digits than its factorization.

28731430143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664 (or 5661 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 28731430143 in words is "twenty-eight billion, seven hundred thirty-one million, four hundred thirty thousand, one hundred forty-three".