28258272 has 144 divisors (see below), whose sum is σ = 93405312. Its totient is φ = 7937280.

The previous prime is 28258261. The next prime is 28258277. The reversal of 28258272 is 27285282.

28258272 is a `hidden beast` number, since 2 + 8 + 2 + 582 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28258277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215647 + ... + 215777.

It is an arithmetic number, because the mean of its divisors is an integer number (648648).

Almost surely, 2^28258272 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 28258272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46702656).

28258272 is an abundant number, since it is smaller than the sum of its proper divisors (65147040).

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

28258272 is a wasteful number, since it uses less digits than its factorization.

28258272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 250 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 28258272 is about 5315.8510137136. The cubic root of 28258272 is about 304.5896910353.

The spelling of 28258272 in words is "twenty-eight million, two hundred fifty-eight thousand, two hundred seventy-two".