21848628 has 24 divisors (see below), whose sum is σ = 51227680. Its totient is φ = 7247520.

The previous prime is 21848609. The next prime is 21848639. The reversal of 21848628 is 82684812.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1783 + ... + 6846.

Almost surely, 2^21848628 is an apocalyptic number.

It is an amenable number.

21848628 is an abundant number, since it is smaller than the sum of its proper divisors (29379052).

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

21848628 is a wasteful number, since it uses less digits than its factorization.

21848628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8847 (or 8845 counting only the distinct ones).

The product of its digits is 49152, while the sum is 39.

The square root of 21848628 is about 4674.2515978496. The cubic root of 21848628 is about 279.5598015074.

The spelling of 21848628 in words is "twenty-one million, eight hundred forty-eight thousand, six hundred twenty-eight".