21928052 has 12 divisors (see below), whose sum is σ = 40393920. Its totient is φ = 10386936.

The previous prime is 21928043. The next prime is 21928099. The reversal of 21928052 is 25082912.

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, 144188 + ... + 144339.

It is an arithmetic number, because the mean of its divisors is an integer number (3366160).

Almost surely, 2^21928052 is an apocalyptic number.

It is an amenable number.

21928052 is a deficient number, since it is larger than the sum of its proper divisors (18465868).

21928052 is a wasteful number, since it uses less digits than its factorization.

21928052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288550 (or 288548 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21928052 is about 4682.7397963158. The cubic root of 21928052 is about 279.8981432237.

The spelling of 21928052 in words is "twenty-one million, nine hundred twenty-eight thousand, fifty-two".