28749688704 has 192 divisors, whose sum is σ = 93364455600. Its totient is φ = 8411504640.

The previous prime is 28749688699. The next prime is 28749688729. The reversal of 28749688704 is 40788694782.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328372 + ... + 406604.

Almost surely, 2^28749688704 is an apocalyptic number.

28749688704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28749688704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46682227800).

28749688704 is an abundant number, since it is smaller than the sum of its proper divisors (64614766896).

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

28749688704 is a wasteful number, since it uses less digits than its factorization.

28749688704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78293 (or 78278 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 28749688704 in words is "twenty-eight billion, seven hundred forty-nine million, six hundred eighty-eight thousand, seven hundred four".