28142269544 has 8 divisors (see below), whose sum is σ = 52766755410. Its totient is φ = 14071134768.

The previous prime is 28142269543. The next prime is 28142269549. The reversal of 28142269544 is 44596224182.

It can be written as a sum of positive squares in only one way, i.e., 21342288100 + 6799981444 = 146090^2 + 82462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28142269543) by changing a digit.

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 as a sum of consecutive naturals, namely, 1758891839 + ... + 1758891854.

Almost surely, 2^28142269544 is an apocalyptic number.

It is an amenable number.

28142269544 is a deficient number, since it is larger than the sum of its proper divisors (24624485866).

28142269544 is a wasteful number, since it uses less digits than its factorization.

28142269544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517783699 (or 3517783695 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The spelling of 28142269544 in words is "twenty-eight billion, one hundred forty-two million, two hundred sixty-nine thousand, five hundred forty-four".