28057752 has 112 divisors (see below), whose sum is σ = 83811240. Its totient is φ = 8771328.

The previous prime is 28057751. The next prime is 28057753. The reversal of 28057752 is 25775082.

28057752 is a `hidden beast` number, since 2 + 80 + 577 + 5 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (28057751) and next prime (28057753).

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 (28057751) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 99003 + ... + 99285.

Almost surely, 2^28057752 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 28057752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41905620).

28057752 is an abundant number, since it is smaller than the sum of its proper divisors (55753488).

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

28057752 is a wasteful number, since it uses less digits than its factorization.

28057752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 28057752 is about 5296.9568621993. The cubic root of 28057752 is about 303.8675265374.

The spelling of 28057752 in words is "twenty-eight million, fifty-seven thousand, seven hundred fifty-two".