28488726 has 32 divisors (see below), whose sum is σ = 72353280. Its totient is φ = 8139528.

The previous prime is 28488709. The next prime is 28488731. The reversal of 28488726 is 62788482.

It is a happy number.

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, 37306 + ... + 38061.

It is an arithmetic number, because the mean of its divisors is an integer number (2261040).

Almost surely, 2^28488726 is an apocalyptic number.

28488726 is an abundant number, since it is smaller than the sum of its proper divisors (43864554).

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

28488726 is a wasteful number, since it uses less digits than its factorization.

28488726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75385 (or 75379 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 28488726 is about 5337.4831147274. The cubic root of 28488726 is about 305.4154546160.

The spelling of 28488726 in words is "twenty-eight million, four hundred eighty-eight thousand, seven hundred twenty-six".