28160172 has 36 divisors (see below), whose sum is σ = 72530640. Its totient is φ = 9208992.

The previous prime is 28160137. The next prime is 28160173. The reversal of 28160172 is 27106182.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (28160173) 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 11 ways as a sum of consecutive naturals, for example, 5472 + ... + 9287.

It is an arithmetic number, because the mean of its divisors is an integer number (2014740).

Almost surely, 2^28160172 is an apocalyptic number.

It is an amenable number.

28160172 is an abundant number, since it is smaller than the sum of its proper divisors (44370468).

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

28160172 is a wasteful number, since it uses less digits than its factorization.

28160172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14822 (or 14817 counting only the distinct ones).

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

The square root of 28160172 is about 5306.6158707787. The cubic root of 28160172 is about 304.2368162799.

The spelling of 28160172 in words is "twenty-eight million, one hundred sixty thousand, one hundred seventy-two".