28025844 has 96 divisors (see below), whose sum is σ = 83328000. Its totient is φ = 7267680.

The previous prime is 28025839. The next prime is 28025849. The reversal of 28025844 is 44852082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28025839) and next prime (28025849).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44967 + ... + 45585.

It is an arithmetic number, because the mean of its divisors is an integer number (868000).

Almost surely, 2^28025844 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 28025844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41664000).

28025844 is an abundant number, since it is smaller than the sum of its proper divisors (55302156).

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

28025844 is a wasteful number, since it uses less digits than its factorization.

28025844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 28025844 is about 5293.9440873511. The cubic root of 28025844 is about 303.7522941790.

It can be divided in two parts, 2802 and 5844, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 28025844 in words is "twenty-eight million, twenty-five thousand, eight hundred forty-four".