28126431650 has 24 divisors (see below), whose sum is σ = 52604213844. Its totient is φ = 11188411200.

The previous prime is 28126431649. The next prime is 28126431701. The reversal of 28126431650 is 5613462182.

It can be written as a sum of positive squares in 6 ways, for example, as 10675229041 + 17451202609 = 103321^2 + 132103^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1544897 + ... + 1562996.

Almost surely, 2^28126431650 is an apocalyptic number.

28126431650 is a deficient number, since it is larger than the sum of its proper divisors (24477782194).

28126431650 is a wasteful number, since it uses less digits than its factorization.

28126431650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108086 (or 3108081 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 28126431650 in words is "twenty-eight billion, one hundred twenty-six million, four hundred thirty-one thousand, six hundred fifty".