21282798 has 16 divisors (see below), whose sum is σ = 42642000. Its totient is φ = 7081536.

The previous prime is 21282791. The next prime is 21282799. The reversal of 21282798 is 89728212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21282791) 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, 828 + ... + 6576.

It is an arithmetic number, because the mean of its divisors is an integer number (2665125).

Almost surely, 2^21282798 is an apocalyptic number.

21282798 is an abundant number, since it is smaller than the sum of its proper divisors (21359202).

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

21282798 is a wasteful number, since it uses less digits than its factorization.

21282798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371.

The product of its digits is 32256, while the sum is 39.

The square root of 21282798 is about 4613.3282996119. The cubic root of 21282798 is about 277.1253413210.

The spelling of 21282798 in words is "twenty-one million, two hundred eighty-two thousand, seven hundred ninety-eight".