21828898 has 64 divisors (see below), whose sum is σ = 42964992. Its totient is φ = 8087040.

The previous prime is 21828881. The next prime is 21828899. The reversal of 21828898 is 89882812.

It is not an unprimeable number, because it can be changed into a prime (21828899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298990 + ... + 299062.

It is an arithmetic number, because the mean of its divisors is an integer number (671328).

Almost surely, 2^21828898 is an apocalyptic number.

21828898 is a deficient number, since it is larger than the sum of its proper divisors (21136094).

21828898 is a wasteful number, since it uses less digits than its factorization.

21828898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179.

The product of its digits is 147456, while the sum is 46.

The square root of 21828898 is about 4672.1406228837. The cubic root of 21828898 is about 279.4756257260.

The spelling of 21828898 in words is "twenty-one million, eight hundred twenty-eight thousand, eight hundred ninety-eight".