28731747459 has 4 divisors (see below), whose sum is σ = 38308996616. Its totient is φ = 19154498304.

The previous prime is 28731747431. The next prime is 28731747461. The reversal of 28731747459 is 95474713782.

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

It is not a de Polignac number, because 28731747459 - 2⁸ = 28731747203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28731747399 and 28731747408.

It is not an unprimeable number, because it can be changed into a prime (28731747259) 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, 4788624574 + ... + 4788624579.

It is an arithmetic number, because the mean of its divisors is an integer number (9577249154).

Almost surely, 2^28731747459 is an apocalyptic number.

28731747459 is a deficient number, since it is larger than the sum of its proper divisors (9577249157).

28731747459 is an equidigital number, since it uses as much as digits as its factorization.

28731747459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9577249156.

The product of its digits is 11854080, while the sum is 57.

The spelling of 28731747459 in words is "twenty-eight billion, seven hundred thirty-one million, seven hundred forty-seven thousand, four hundred fifty-nine".