28143024 has 160 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 6967296.

The previous prime is 28143013. The next prime is 28143061. The reversal of 28143024 is 42034182.

It is a Cunningham number, because it is equal to 5305²-1.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 28142985 and 28143003.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74067 + ... + 74445.

It is an arithmetic number, because the mean of its divisors is an integer number (593712).

Almost surely, 2^28143024 is an apocalyptic number.

28143024 is a gapful number since it is divisible by the number (24) 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 28143024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47496960).

28143024 is an abundant number, since it is smaller than the sum of its proper divisors (66850896).

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

28143024 is a wasteful number, since it uses less digits than its factorization.

28143024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 28143024 is about 5304.9999057493. Note that the first 4 decimals coincide. The cubic root of 28143024 is about 304.1750492300.

The spelling of 28143024 in words is "twenty-eight million, one hundred forty-three thousand, twenty-four".