28685252 has 12 divisors (see below), whose sum is σ = 50241660. Its totient is φ = 14330496.

The previous prime is 28685233. The next prime is 28685297. The reversal of 28685252 is 25258682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25060036 + 3625216 = 5006^2 + 1904^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 4208 + ... + 8664.

It is an arithmetic number, because the mean of its divisors is an integer number (4186805).

Almost surely, 2^28685252 is an apocalyptic number.

It is an amenable number.

28685252 is a deficient number, since it is larger than the sum of its proper divisors (21556408).

28685252 is a wasteful number, since it uses less digits than its factorization.

28685252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6070 (or 6068 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The square root of 28685252 is about 5355.8614619872. The cubic root of 28685252 is about 306.1161363036.

The spelling of 28685252 in words is "twenty-eight million, six hundred eighty-five thousand, two hundred fifty-two".