28088724 has 12 divisors (see below), whose sum is σ = 65540384. Its totient is φ = 9362904.

The previous prime is 28088659. The next prime is 28088729. The reversal of 28088724 is 42788082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28088729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170352 + ... + 1170375.

Almost surely, 2^28088724 is an apocalyptic number.

It is an amenable number.

28088724 is an abundant number, since it is smaller than the sum of its proper divisors (37451660).

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

28088724 is a wasteful number, since it uses less digits than its factorization.

28088724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340734 (or 2340732 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 28088724 is about 5299.8796212744. The cubic root of 28088724 is about 303.9792951042.

The spelling of 28088724 in words is "twenty-eight million, eighty-eight thousand, seven hundred twenty-four".