28172160 has 192 divisors, whose sum is σ = 100086480. Its totient is φ = 7299072.

The previous prime is 28172159. The next prime is 28172173. The reversal of 28172160 is 6127182.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385884 + ... + 385956.

Almost surely, 2^28172160 is an apocalyptic number.

28172160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28172160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50043240).

28172160 is an abundant number, since it is smaller than the sum of its proper divisors (71914320).

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

28172160 is a wasteful number, since it uses less digits than its factorization.

28172160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 28172160 is about 5307.7452840166. The cubic root of 28172160 is about 304.2799821329.

The spelling of 28172160 in words is "twenty-eight million, one hundred seventy-two thousand, one hundred sixty".