21828848 has 10 divisors (see below), whose sum is σ = 42293424. Its totient is φ = 10914416.

The previous prime is 21828847. The next prime is 21828869. The reversal of 21828848 is 84882812.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21828841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682136 + ... + 682167.

Almost surely, 2^21828848 is an apocalyptic number.

It is an amenable number.

21828848 is a deficient number, since it is larger than the sum of its proper divisors (20464576).

21828848 is a wasteful number, since it uses less digits than its factorization.

21828848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364311 (or 1364305 counting only the distinct ones).

The product of its digits is 65536, while the sum is 41.

The square root of 21828848 is about 4672.1352720143. The cubic root of 21828848 is about 279.4754123423.

The spelling of 21828848 in words is "twenty-one million, eight hundred twenty-eight thousand, eight hundred forty-eight".