28185272 has 8 divisors (see below), whose sum is σ = 52847400. Its totient is φ = 14092632.

The previous prime is 28185271. The next prime is 28185299. The reversal of 28185272 is 27258182.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28185271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1761572 + ... + 1761587.

It is an arithmetic number, because the mean of its divisors is an integer number (6605925).

Almost surely, 2^28185272 is an apocalyptic number.

It is an amenable number.

28185272 is a deficient number, since it is larger than the sum of its proper divisors (24662128).

28185272 is a wasteful number, since it uses less digits than its factorization.

28185272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523165 (or 3523161 counting only the distinct ones).

The product of its digits is 17920, while the sum is 35.

The square root of 28185272 is about 5308.9803164073. The cubic root of 28185272 is about 304.3271812154.

The spelling of 28185272 in words is "twenty-eight million, one hundred eighty-five thousand, two hundred seventy-two".