28144248 has 64 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 8025600.

The previous prime is 28144247. The next prime is 28144261. The reversal of 28144248 is 84244182.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28144243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (1270080).

Almost surely, 2^28144248 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 28144248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

28144248 is an abundant number, since it is smaller than the sum of its proper divisors (53140872).

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

28144248 is a wasteful number, since it uses less digits than its factorization.

28144248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308 (or 6304 counting only the distinct ones).

The product of its digits is 16384, while the sum is 33.

The square root of 28144248 is about 5305.1152673622. The cubic root of 28144248 is about 304.1794589061.

The spelling of 28144248 in words is "twenty-eight million, one hundred forty-four thousand, two hundred forty-eight".