21828192 has 24 divisors (see below), whose sum is σ = 57299256. Its totient is φ = 7276032.

The previous prime is 21828167. The next prime is 21828197. The reversal of 21828192 is 29182812.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21828197) 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, 113593 + ... + 113784.

It is an arithmetic number, because the mean of its divisors is an integer number (2387469).

Almost surely, 2^21828192 is an apocalyptic number.

It is an amenable number.

21828192 is an abundant number, since it is smaller than the sum of its proper divisors (35471064).

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

21828192 is a wasteful number, since it uses less digits than its factorization.

21828192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227390 (or 227382 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 21828192 is about 4672.0650680400. The cubic root of 21828192 is about 279.4726127182.

The spelling of 21828192 in words is "twenty-one million, eight hundred twenty-eight thousand, one hundred ninety-two".