21824088 has 64 divisors (see below), whose sum is σ = 64108800. Its totient is φ = 6103680.

The previous prime is 21824087. The next prime is 21824119. The reversal of 21824088 is 88042812.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21824081) 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, 253 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (1001700).

Almost surely, 2^21824088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21824088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32054400).

21824088 is an abundant number, since it is smaller than the sum of its proper divisors (42284712).

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

21824088 is a wasteful number, since it uses less digits than its factorization.

21824088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392 (or 6388 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 21824088 is about 4671.6258411821. The cubic root of 21824088 is about 279.4550967234.

The spelling of 21824088 in words is "twenty-one million, eight hundred twenty-four thousand, eighty-eight".