28431650485 has 12 divisors (see below), whose sum is σ = 39688263468. Its totient is φ = 19495988736.

The previous prime is 28431650461. The next prime is 28431650557. The reversal of 28431650485 is 58405613482.

It can be written as a sum of positive squares in 2 ways, for example, as 19010618641 + 9421031844 = 137879^2 + 97062^2 .

It is not a de Polignac number, because 28431650485 - 2⁵ = 28431650453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58023532 + ... + 58024021.

It is an arithmetic number, because the mean of its divisors is an integer number (3307355289).

Almost surely, 2^28431650485 is an apocalyptic number.

It is an amenable number.

28431650485 is a deficient number, since it is larger than the sum of its proper divisors (11256612983).

28431650485 is a wasteful number, since it uses less digits than its factorization.

28431650485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116047572 (or 116047565 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 28431650485 in words is "twenty-eight billion, four hundred thirty-one million, six hundred fifty thousand, four hundred eighty-five".