28181852 has 48 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 12364800.

The previous prime is 28181851. The next prime is 28181863. The reversal of 28181852 is 25818182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28181851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60902 + ... + 61362.

It is an arithmetic number, because the mean of its divisors is an integer number (1164240).

Almost surely, 2^28181852 is an apocalyptic number.

It is an amenable number.

28181852 is a deficient number, since it is larger than the sum of its proper divisors (27701668).

28181852 is a wasteful number, since it uses less digits than its factorization.

28181852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 540 counting only the distinct ones).

The product of its digits is 10240, while the sum is 35.

The square root of 28181852 is about 5308.6582108853. The cubic root of 28181852 is about 304.3148717007.

The spelling of 28181852 in words is "twenty-eight million, one hundred eighty-one thousand, eight hundred fifty-two".