28161735344 has 20 divisors (see below), whose sum is σ = 54961639224. Its totient is φ = 13978086528.

The previous prime is 28161735331. The next prime is 28161735389. The reversal of 28161735344 is 44353716182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28161735295 and 28161735304.

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, 6421562 + ... + 6425945.

Almost surely, 2^28161735344 is an apocalyptic number.

It is an amenable number.

28161735344 is a deficient number, since it is larger than the sum of its proper divisors (26799903880).

28161735344 is a wasteful number, since it uses less digits than its factorization.

28161735344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12847652 (or 12847646 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The spelling of 28161735344 in words is "twenty-eight billion, one hundred sixty-one million, seven hundred thirty-five thousand, three hundred forty-four".