32421928 has 96 divisors (see below), whose sum is σ = 78960960. Its totient is φ = 12337920.

The previous prime is 32421911. The next prime is 32421929. The reversal of 32421928 is 82912423.

32421928 is nontrivially palindromic in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 32421928.

It is not an unprimeable number, because it can be changed into a prime (32421929) 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 23 ways as a sum of consecutive naturals, for example, 314725 + ... + 314827.

It is an arithmetic number, because the mean of its divisors is an integer number (822510).

Almost surely, 2^32421928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32421928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39480480).

32421928 is an abundant number, since it is smaller than the sum of its proper divisors (46539032).

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

32421928 is a wasteful number, since it uses less digits than its factorization.

32421928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 196 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 32421928 is about 5694.0256409679. The cubic root of 32421928 is about 318.8694742185.

The spelling of 32421928 in words is "thirty-two million, four hundred twenty-one thousand, nine hundred twenty-eight".