28271424 has 56 divisors (see below), whose sum is σ = 75244960. Its totient is φ = 9368064.

The previous prime is 28271423. The next prime is 28271429. The reversal of 28271424 is 42417282.

It is a junction number, because it is equal to n+sod(n) for n = 28271391 and 28271400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28271423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43647 + ... + 44289.

It is an arithmetic number, because the mean of its divisors is an integer number (1343660).

Almost surely, 2^28271424 is an apocalyptic number.

28271424 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 28271424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37622480).

28271424 is an abundant number, since it is smaller than the sum of its proper divisors (46973536).

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

28271424 is a wasteful number, since it uses less digits than its factorization.

28271424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 877 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 28271424 is about 5317.0879247949. The cubic root of 28271424 is about 304.6369378767.

The spelling of 28271424 in words is "twenty-eight million, two hundred seventy-one thousand, four hundred twenty-four".