28088704 has 128 divisors (see below), whose sum is σ = 70502400. Its totient is φ = 10881024.

The previous prime is 28088659. The next prime is 28088729. The reversal of 28088704 is 40788082.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597609 + ... + 597655.

It is an arithmetic number, because the mean of its divisors is an integer number (550800).

Almost surely, 2^28088704 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 28088704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35251200).

28088704 is an abundant number, since it is smaller than the sum of its proper divisors (42413696).

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

28088704 is a wasteful number, since it uses less digits than its factorization.

28088704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28088704 is about 5299.8777344388. The cubic root of 28088704 is about 303.9792229567.

The spelling of 28088704 in words is "twenty-eight million, eighty-eight thousand, seven hundred four".