28725726 has 8 divisors (see below), whose sum is σ = 57451464. Its totient is φ = 9575240.

The previous prime is 28725721. The next prime is 28725737. The reversal of 28725726 is 62752782.

It is a sphenic number, since it is the product of 3 distinct primes.

28725726 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28725721) 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, 2393805 + ... + 2393816.

It is an arithmetic number, because the mean of its divisors is an integer number (7181433).

Almost surely, 2^28725726 is an apocalyptic number.

28725726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28725726 is a wasteful number, since it uses less digits than its factorization.

28725726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4787626.

The product of its digits is 94080, while the sum is 39.

The square root of 28725726 is about 5359.6386072197. The cubic root of 28725726 is about 306.2600420975.

The spelling of 28725726 in words is "twenty-eight million, seven hundred twenty-five thousand, seven hundred twenty-six".