32197728 has 96 divisors (see below), whose sum is σ = 90810720. Its totient is φ = 9953280.

The previous prime is 32197727. The next prime is 32197741. The reversal of 32197728 is 82779123.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32197727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177798 + ... + 177978.

It is an arithmetic number, because the mean of its divisors is an integer number (945945).

Almost surely, 2^32197728 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 32197728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45405360).

32197728 is an abundant number, since it is smaller than the sum of its proper divisors (58612992).

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

32197728 is a wasteful number, since it uses less digits than its factorization.

32197728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 312 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 32197728 is about 5674.3041864179. The cubic root of 32197728 is about 318.1327715816.

The spelling of 32197728 in words is "thirty-two million, one hundred ninety-seven thousand, seven hundred twenty-eight".