28868424 has 64 divisors (see below), whose sum is σ = 78939840. Its totient is φ = 8743680.

The previous prime is 28868423. The next prime is 28868459. The reversal of 28868424 is 42486882.

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

It is not an unprimeable number, because it can be changed into a prime (28868423) 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, 20214 + ... + 21594.

It is an arithmetic number, because the mean of its divisors is an integer number (1233435).

Almost surely, 2^28868424 is an apocalyptic number.

28868424 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 28868424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39469920).

28868424 is an abundant number, since it is smaller than the sum of its proper divisors (50071416).

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

28868424 is a wasteful number, since it uses less digits than its factorization.

28868424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1466 counting only the distinct ones).

The product of its digits is 196608, while the sum is 42.

The square root of 28868424 is about 5372.9343937927. The cubic root of 28868424 is about 306.7663307655.

It can be divided in two parts, 28868 and 424, that added together give a palindrome (29292).

The spelling of 28868424 in words is "twenty-eight million, eight hundred sixty-eight thousand, four hundred twenty-four".