32172028 has 48 divisors (see below), whose sum is σ = 66528000. Its totient is φ = 13606320.

The previous prime is 32171999. The next prime is 32172037. The reversal of 32172028 is 82027123.

It is a junction number, because it is equal to n+sod(n) for n = 32171993 and 32172011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179643 + ... + 179821.

It is an arithmetic number, because the mean of its divisors is an integer number (1386000).

Almost surely, 2^32172028 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 32172028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33264000).

32172028 is an abundant number, since it is smaller than the sum of its proper divisors (34355972).

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

32172028 is a wasteful number, since it uses less digits than its factorization.

32172028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 32172028 is about 5672.0391394982. The cubic root of 32172028 is about 318.0481052708.

The spelling of 32172028 in words is "thirty-two million, one hundred seventy-two thousand, twenty-eight".