28284513291639 has 40 divisors (see below), whose sum is σ = 47580160995840. Its totient is φ = 16589157339600.

The previous prime is 28284513291637. The next prime is 28284513291673. The reversal of 28284513291639 is 93619231548282.

28284513291639 is a `hidden beast` number, since 2 + 8 + 2 + 8 + 451 + 32 + 91 + 63 + 9 = 666.

It is not a de Polignac number, because 28284513291639 - 2¹ = 28284513291637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28284513291637) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 511983409 + ... + 512038650.

It is an arithmetic number, because the mean of its divisors is an integer number (1189504024896).

Almost surely, 2^{28284513291639} is an apocalyptic number.

28284513291639 is a deficient number, since it is larger than the sum of its proper divisors (19295647704201).

28284513291639 is a wasteful number, since it uses less digits than its factorization.

28284513291639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024022113 (or 1024022104 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 28284513291639 in words is "twenty-eight trillion, two hundred eighty-four billion, five hundred thirteen million, two hundred ninety-one thousand, six hundred thirty-nine".