28075872 has 72 divisors (see below), whose sum is σ = 81041688. Its totient is φ = 8504320.

The previous prime is 28075841. The next prime is 28075877. The reversal of 28075872 is 27857082.

It is a self number, because there is not a number n which added to its sum of digits gives 28075872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10408 + ... + 12824.

It is an arithmetic number, because the mean of its divisors is an integer number (1125579).

Almost surely, 2^28075872 is an apocalyptic number.

28075872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28075872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40520844).

28075872 is an abundant number, since it is smaller than the sum of its proper divisors (52965816).

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

28075872 is a wasteful number, since it uses less digits than its factorization.

28075872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452 (or 2433 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 28075872 is about 5298.6670021808. The cubic root of 28075872 is about 303.9329261069.

The spelling of 28075872 in words is "twenty-eight million, seventy-five thousand, eight hundred seventy-two".