21883028 has 12 divisors (see below), whose sum is σ = 39960480. Its totient is φ = 10465752.

The previous prime is 21883019. The next prime is 21883031. The reversal of 21883028 is 82038812.

It is a junction number, because it is equal to n+sod(n) for n = 21882985 and 21883003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118838 + ... + 119021.

It is an arithmetic number, because the mean of its divisors is an integer number (3330040).

Almost surely, 2^21883028 is an apocalyptic number.

It is an amenable number.

21883028 is a deficient number, since it is larger than the sum of its proper divisors (18077452).

21883028 is a wasteful number, since it uses less digits than its factorization.

21883028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237886 (or 237884 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 21883028 is about 4677.9298840406. The cubic root of 21883028 is about 279.7064440400.

The spelling of 21883028 in words is "twenty-one million, eight hundred eighty-three thousand, twenty-eight".