28589436 has 72 divisors (see below), whose sum is σ = 76236160. Its totient is φ = 9366192.

The previous prime is 28589417. The next prime is 28589441. The reversal of 28589436 is 63498582.

28589436 is a `hidden beast` number, since 28 + 589 + 43 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28589391 and 28589400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64905 + ... + 65343.

Almost surely, 2^28589436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28589436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38118080).

28589436 is an abundant number, since it is smaller than the sum of its proper divisors (47646724).

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

28589436 is a wasteful number, since it uses less digits than its factorization.

28589436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 511 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 28589436 is about 5346.9090136265. The cubic root of 28589436 is about 305.7749209884.

The spelling of 28589436 in words is "twenty-eight million, five hundred eighty-nine thousand, four hundred thirty-six".