28089336 has 64 divisors (see below), whose sum is σ = 77425920. Its totient is φ = 8421120.

The previous prime is 28089241. The next prime is 28089337. The reversal of 28089336 is 63398082.

It is a junction number, because it is equal to n+sod(n) for n = 28089294 and 28089303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28089337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26676 + ... + 27708.

It is an arithmetic number, because the mean of its divisors is an integer number (1209780).

Almost surely, 2^28089336 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 28089336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38712960).

28089336 is an abundant number, since it is smaller than the sum of its proper divisors (49336584).

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

28089336 is a wasteful number, since it uses less digits than its factorization.

28089336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28089336 is about 5299.9373581204. The cubic root of 28089336 is about 303.9815027988.

The spelling of 28089336 in words is "twenty-eight million, eighty-nine thousand, three hundred thirty-six".