21484328 has 32 divisors (see below), whose sum is σ = 43704360. Its totient is φ = 9861120.

The previous prime is 21484327. The next prime is 21484339. The reversal of 21484328 is 82348412.

It can be written as a sum of positive squares in 4 ways, for example, as 20775364 + 708964 = 4558^2 + 842^2 .

It is a super-2 number, since 2×21484328² = 923152699223168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21484294 and 21484303.

It is not an unprimeable number, because it can be changed into a prime (21484321) 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, 3650 + ... + 7502.

Almost surely, 2^21484328 is an apocalyptic number.

It is an amenable number.

21484328 is an abundant number, since it is smaller than the sum of its proper divisors (22220032).

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

21484328 is a wasteful number, since it uses less digits than its factorization.

21484328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917 (or 3913 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 21484328 is about 4635.1189844491. The cubic root of 21484328 is about 277.9973086019.

It can be divided in two parts, 21484 and 328, that added together give a palindrome (21812).

The spelling of 21484328 in words is "twenty-one million, four hundred eighty-four thousand, three hundred twenty-eight".