28287654556 has 48 divisors (see below), whose sum is σ = 61606540800. Its totient is φ = 11089165248.

The previous prime is 28287654539. The next prime is 28287654557. The reversal of 28287654556 is 65545678282.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 28287654556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287654557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901336 + ... + 932191.

It is an arithmetic number, because the mean of its divisors is an integer number (1283469600).

Almost surely, 2^28287654556 is an apocalyptic number.

It is an amenable number.

28287654556 is an abundant number, since it is smaller than the sum of its proper divisors (33318886244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28287654556 is a wasteful number, since it uses less digits than its factorization.

28287654556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833586 (or 1833584 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 58.

The spelling of 28287654556 in words is "twenty-eight billion, two hundred eighty-seven million, six hundred fifty-four thousand, five hundred fifty-six".