28738272 has 24 divisors (see below), whose sum is σ = 75438216. Its totient is φ = 9579392.

The previous prime is 28738261. The next prime is 28738289. The reversal of 28738272 is 27283782.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28738272.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149583 + ... + 149774.

It is an arithmetic number, because the mean of its divisors is an integer number (3143259).

Almost surely, 2^28738272 is an apocalyptic number.

It is an amenable number.

28738272 is an abundant number, since it is smaller than the sum of its proper divisors (46699944).

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

28738272 is a wasteful number, since it uses less digits than its factorization.

28738272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299370 (or 299362 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 28738272 is about 5360.8088941875. The cubic root of 28738272 is about 306.3046221050.

The spelling of 28738272 in words is "twenty-eight million, seven hundred thirty-eight thousand, two hundred seventy-two".