28587135831 has 16 divisors (see below), whose sum is σ = 38776946688. Its totient is φ = 18728287200.

The previous prime is 28587135803. The next prime is 28587135853. The reversal of 28587135831 is 13853178582.

It is not a de Polignac number, because 28587135831 - 2⁵ = 28587135799 is a prime.

It is a super-2 number, since 2×28587135831² (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 (28587135431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127066 + ... + 270776.

It is an arithmetic number, because the mean of its divisors is an integer number (2423559168).

Almost surely, 2^28587135831 is an apocalyptic number.

28587135831 is a deficient number, since it is larger than the sum of its proper divisors (10189810857).

28587135831 is a wasteful number, since it uses less digits than its factorization.

28587135831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144862.

The product of its digits is 1612800, while the sum is 51.

The spelling of 28587135831 in words is "twenty-eight billion, five hundred eighty-seven million, one hundred thirty-five thousand, eight hundred thirty-one".