8172928 has 32 divisors (see below), whose sum is σ = 16542360. Its totient is φ = 4021248.

The previous prime is 8172919. The next prime is 8172943. The reversal of 8172928 is 8292718.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8100 + ... + 9052.

Almost surely, 2^8172928 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 8172928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8271180).

8172928 is an abundant number, since it is smaller than the sum of its proper divisors (8369432).

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

8172928 is an equidigital number, since it uses as much as digits as its factorization.

8172928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1022 counting only the distinct ones).

The product of its digits is 16128, while the sum is 37.

The square root of 8172928 is about 2858.8333284751. The cubic root of 8172928 is about 201.4308062248.

The spelling of 8172928 in words is "eight million, one hundred seventy-two thousand, nine hundred twenty-eight".