28705464704 has 64 divisors (see below), whose sum is σ = 65597913600. Its totient is φ = 12256842240.

The previous prime is 28705464691. The next prime is 28705464707. The reversal of 28705464704 is 40746450782.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28705464707) 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 7 ways as a sum of consecutive naturals, for example, 183707 + ... + 301925.

It is an arithmetic number, because the mean of its divisors is an integer number (1024967400).

Almost surely, 2^28705464704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28705464704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32798956800).

28705464704 is an abundant number, since it is smaller than the sum of its proper divisors (36892448896).

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

28705464704 is a wasteful number, since it uses less digits than its factorization.

28705464704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118511 (or 118499 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 47.

The spelling of 28705464704 in words is "twenty-eight billion, seven hundred five million, four hundred sixty-four thousand, seven hundred four".