28358424 has 80 divisors (see below), whose sum is σ = 80368200. Its totient is φ = 9341568.

The previous prime is 28358423. The next prime is 28358441. The reversal of 28358424 is 42485382.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28358423) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69132 + ... + 69540.

Almost surely, 2^28358424 is an apocalyptic number.

28358424 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 28358424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40184100).

28358424 is an abundant number, since it is smaller than the sum of its proper divisors (52009776).

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

28358424 is a wasteful number, since it uses less digits than its factorization.

28358424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 521 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 28358424 is about 5325.2628104160. The cubic root of 28358424 is about 304.9491055453.

It can be divided in two parts, 28358 and 424, that added together give a palindrome (28782).

The spelling of 28358424 in words is "twenty-eight million, three hundred fifty-eight thousand, four hundred twenty-four".