28285628131 has 2 divisors, whose sum is σ = 28285628132. Its totient is φ = 28285628130.

The previous prime is 28285628117. The next prime is 28285628197. The reversal of 28285628131 is 13182658282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28285628131 - 2⁵ = 28285628099 is a prime.

It is a super-2 number, since 2×28285628131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28285628431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142814065 + 14142814066.

It is an arithmetic number, because the mean of its divisors is an integer number (14142814066).

Almost surely, 2^28285628131 is an apocalyptic number.

28285628131 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285628131 is an equidigital number, since it uses as much as digits as its factorization.

28285628131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 46.

The spelling of 28285628131 in words is "twenty-eight billion, two hundred eighty-five million, six hundred twenty-eight thousand, one hundred thirty-one".