28145252 has 12 divisors (see below), whose sum is σ = 49948416. Its totient is φ = 13874280.

The previous prime is 28145209. The next prime is 28145267. The reversal of 28145252 is 25254182.

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, 49268 + ... + 49835.

It is an arithmetic number, because the mean of its divisors is an integer number (4162368).

Almost surely, 2^28145252 is an apocalyptic number.

It is an amenable number.

28145252 is a deficient number, since it is larger than the sum of its proper divisors (21803164).

28145252 is a wasteful number, since it uses less digits than its factorization.

28145252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99178 (or 99176 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 28145252 is about 5305.2098921720. The cubic root of 28145252 is about 304.1830758980.

The spelling of 28145252 in words is "twenty-eight million, one hundred forty-five thousand, two hundred fifty-two".