28585236 has 12 divisors (see below), whose sum is σ = 66698912. Its totient is φ = 9528408.

The previous prime is 28585231. The next prime is 28585237. The reversal of 28585236 is 63258582.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 28585194 and 28585203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191040 + ... + 1191063.

Almost surely, 2^28585236 is an apocalyptic number.

It is an amenable number.

28585236 is an abundant number, since it is smaller than the sum of its proper divisors (38113676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28585236 is a wasteful number, since it uses less digits than its factorization.

28585236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382110 (or 2382108 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 28585236 is about 5346.5162489232. The cubic root of 28585236 is about 305.7599467212.

The spelling of 28585236 in words is "twenty-eight million, five hundred eighty-five thousand, two hundred thirty-six".