21828468 has 24 divisors (see below), whose sum is σ = 51105600. Its totient is φ = 7251520.

The previous prime is 21828467. The next prime is 21828479. The reversal of 21828468 is 86482812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21828463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (2129400).

Almost surely, 2^21828468 is an apocalyptic number.

It is an amenable number.

21828468 is an abundant number, since it is smaller than the sum of its proper divisors (29277132).

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

21828468 is a wasteful number, since it uses less digits than its factorization.

21828468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167 (or 6165 counting only the distinct ones).

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

The square root of 21828468 is about 4672.0946052065. The cubic root of 21828468 is about 279.4737906156.

The spelling of 21828468 in words is "twenty-one million, eight hundred twenty-eight thousand, four hundred sixty-eight".