28447189784 has 32 divisors (see below), whose sum is σ = 57449910000. Its totient is φ = 13127536512.

The previous prime is 28447189783. The next prime is 28447189829. The reversal of 28447189784 is 48798174482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447189783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881567 + ... + 913265.

Almost surely, 2^28447189784 is an apocalyptic number.

It is an amenable number.

28447189784 is an abundant number, since it is smaller than the sum of its proper divisors (29002720216).

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

28447189784 is a wasteful number, since it uses less digits than its factorization.

28447189784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40347 (or 40343 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 62.

The spelling of 28447189784 in words is "twenty-eight billion, four hundred forty-seven million, one hundred eighty-nine thousand, seven hundred eighty-four".