28169252 has 12 divisors (see below), whose sum is σ = 49343196. Its totient is φ = 14071200.

The previous prime is 28169249. The next prime is 28169269. The reversal of 28169252 is 25296182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1893376 + 26275876 = 1376^2 + 5126^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2498 + ... + 7910.

It is an arithmetic number, because the mean of its divisors is an integer number (4111933).

Almost surely, 2^28169252 is an apocalyptic number.

It is an amenable number.

28169252 is a deficient number, since it is larger than the sum of its proper divisors (21173944).

28169252 is a wasteful number, since it uses less digits than its factorization.

28169252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718 (or 6716 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 28169252 is about 5307.4713376522. The cubic root of 28169252 is about 304.2695122620.

The spelling of 28169252 in words is "twenty-eight million, one hundred sixty-nine thousand, two hundred fifty-two".