21828882 has 8 divisors (see below), whose sum is σ = 43657776. Its totient is φ = 7276292.

The previous prime is 21828881. The next prime is 21828899. The reversal of 21828882 is 28882812.

It is a sphenic number, since it is the product of 3 distinct primes.

21828882 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21828882.

It is not an unprimeable number, because it can be changed into a prime (21828881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1819068 + ... + 1819079.

It is an arithmetic number, because the mean of its divisors is an integer number (5457222).

Almost surely, 2^21828882 is an apocalyptic number.

21828882 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21828882 is a wasteful number, since it uses less digits than its factorization.

21828882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638152.

The product of its digits is 32768, while the sum is 39.

The square root of 21828882 is about 4672.1389106061. The cubic root of 21828882 is about 279.4755574432.

The spelling of 21828882 in words is "twenty-one million, eight hundred twenty-eight thousand, eight hundred eighty-two".