21852888 has 64 divisors (see below), whose sum is σ = 60912000. Its totient is φ = 6492672.

The previous prime is 21852881. The next prime is 21852889. The reversal of 21852888 is 88825812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21852881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6343 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (951750).

Almost surely, 2^21852888 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 21852888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30456000).

21852888 is an abundant number, since it is smaller than the sum of its proper divisors (39059112).

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

21852888 is a wasteful number, since it uses less digits than its factorization.

21852888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864 (or 2860 counting only the distinct ones).

The product of its digits is 81920, while the sum is 42.

The square root of 21852888 is about 4674.7072635621. The cubic root of 21852888 is about 279.5779696560.

The spelling of 21852888 in words is "twenty-one million, eight hundred fifty-two thousand, eight hundred eighty-eight".