28013864253344 has 48 divisors (see below), whose sum is σ = 55307088183816. Its totient is φ = 13967672832000.

The previous prime is 28013864253341. The next prime is 28013864253413. The reversal of 28013864253344 is 44335246831082.

It can be written as a sum of positive squares in 4 ways, for example, as 27793351363600 + 220512889744 = 5271940^2 + 469588^2 .

It is not an unprimeable number, because it can be changed into a prime (28013864253341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16036004 + ... + 17696924.

Almost surely, 2^{28013864253344} is an apocalyptic number.

It is an amenable number.

28013864253344 is a deficient number, since it is larger than the sum of its proper divisors (27293223930472).

28013864253344 is a wasteful number, since it uses less digits than its factorization.

28013864253344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662409 (or 1662401 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 53.

The spelling of 28013864253344 in words is "twenty-eight trillion, thirteen billion, eight hundred sixty-four million, two hundred fifty-three thousand, three hundred forty-four".