21470328 has 48 divisors (see below), whose sum is σ = 63437400. Its totient is φ = 6505920.

The previous prime is 21470327. The next prime is 21470333. The reversal of 21470328 is 82307412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12763 + ... + 14346.

Almost surely, 2^21470328 is an apocalyptic number.

It is an amenable number.

21470328 is an abundant number, since it is smaller than the sum of its proper divisors (41967072).

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

21470328 is a wasteful number, since it uses less digits than its factorization.

21470328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27132 (or 27125 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 21470328 is about 4633.6085289977. The cubic root of 21470328 is about 277.9369109636.

The spelling of 21470328 in words is "twenty-one million, four hundred seventy thousand, three hundred twenty-eight".