28668442744 has 16 divisors (see below), whose sum is σ = 54114093000. Its totient is φ = 14238017952.

The previous prime is 28668442741. The next prime is 28668442757. The reversal of 28668442744 is 44724486682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28668442741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12024162 + ... + 12026545.

Almost surely, 2^28668442744 is an apocalyptic number.

It is an amenable number.

28668442744 is a deficient number, since it is larger than the sum of its proper divisors (25445650256).

28668442744 is a wasteful number, since it uses less digits than its factorization.

28668442744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24050862 (or 24050858 counting only the distinct ones).

The product of its digits is 16515072, while the sum is 55.

The spelling of 28668442744 in words is "twenty-eight billion, six hundred sixty-eight million, four hundred forty-two thousand, seven hundred forty-four".