28316772135 has 12 divisors (see below), whose sum is σ = 49082405112. Its totient is φ = 15102278448.

The previous prime is 28316772089. The next prime is 28316772149. The reversal of 28316772135 is 53127761382.

It is not a de Polignac number, because 28316772135 - 2²⁰ = 28315723559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 629261603 = 28316772135 / (2 + 8 + 3 + 1 + 6 + 7 + 7 + 2 + 1 + 3 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314630757 + ... + 314630846.

It is an arithmetic number, because the mean of its divisors is an integer number (4090200426).

Almost surely, 2^28316772135 is an apocalyptic number.

28316772135 is a deficient number, since it is larger than the sum of its proper divisors (20765632977).

28316772135 is a wasteful number, since it uses less digits than its factorization.

28316772135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629261614 (or 629261611 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 28316772135 in words is "twenty-eight billion, three hundred sixteen million, seven hundred seventy-two thousand, one hundred thirty-five".