28143956284 has 12 divisors (see below), whose sum is σ = 49499422000. Its totient is φ = 14001264288.

The previous prime is 28143956249. The next prime is 28143956299. The reversal of 28143956284 is 48265934182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17677569 + ... + 17679160.

Almost surely, 2^28143956284 is an apocalyptic number.

It is an amenable number.

28143956284 is a deficient number, since it is larger than the sum of its proper divisors (21355465716).

28143956284 is a wasteful number, since it uses less digits than its factorization.

28143956284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35356932 (or 35356930 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The spelling of 28143956284 in words is "twenty-eight billion, one hundred forty-three million, nine hundred fifty-six thousand, two hundred eighty-four".