28447654587813 has 24 divisors (see below), whose sum is σ = 41422417920000. Its totient is φ = 18812223398304.

The previous prime is 28447654587811. The next prime is 28447654587883. The reversal of 28447654587813 is 31878545674482.

28447654587813 is a `hidden beast` number, since 2 + 8 + 4 + 4 + 7 + 6 + 545 + 8 + 78 + 1 + 3 = 666.

It is not a de Polignac number, because 28447654587813 - 2¹ = 28447654587811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447654587811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3724188 + ... + 8412186.

It is an arithmetic number, because the mean of its divisors is an integer number (1725934080000).

Almost surely, 2^{28447654587813} is an apocalyptic number.

It is an amenable number.

28447654587813 is a deficient number, since it is larger than the sum of its proper divisors (12974763332187).

28447654587813 is a wasteful number, since it uses less digits than its factorization.

28447654587813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693441 (or 4693438 counting only the distinct ones).

The product of its digits is 1445068800, while the sum is 72.

The spelling of 28447654587813 in words is "twenty-eight trillion, four hundred forty-seven billion, six hundred fifty-four million, five hundred eighty-seven thousand, eight hundred thirteen".