28391252815444 has 48 divisors (see below), whose sum is σ = 50207393790400. Its totient is φ = 14046642604800.

The previous prime is 28391252815397. The next prime is 28391252815537. The reversal of 28391252815444 is 44451825219382.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1164566047 + ... + 1164590425.

Almost surely, 2^{28391252815444} is an apocalyptic number.

It is an amenable number.

28391252815444 is a deficient number, since it is larger than the sum of its proper divisors (21816140974956).

28391252815444 is a wasteful number, since it uses less digits than its factorization.

28391252815444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27944 (or 27942 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 58.

The spelling of 28391252815444 in words is "twenty-eight trillion, three hundred ninety-one billion, two hundred fifty-two million, eight hundred fifteen thousand, four hundred forty-four".