28024500 has 192 divisors, whose sum is σ = 99380736. Its totient is φ = 5990400.

The previous prime is 28024499. The next prime is 28024501. The reversal of 28024500 is 542082.

It is an interprime number because it is at equal distance from previous prime (28024499) and next prime (28024501).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28024501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 178422 + ... + 178578.

It is an arithmetic number, because the mean of its divisors is an integer number (517608).

Almost surely, 2^28024500 is an apocalyptic number.

28024500 is a gapful number since it is divisible by the number (20) 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 28024500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49690368).

28024500 is an abundant number, since it is smaller than the sum of its proper divisors (71356236).

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

28024500 is a wasteful number, since it uses less digits than its factorization.

28024500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 28024500 is about 5293.8171483345. The cubic root of 28024500 is about 303.7474385464.

Adding to 28024500 its reverse (542082), we get a palindrome (28566582).

The spelling of 28024500 in words is "twenty-eight million, twenty-four thousand, five hundred".