28689696 has 216 divisors, whose sum is σ = 100835280. Its totient is φ = 7693056.

The previous prime is 28689679. The next prime is 28689707. The reversal of 28689696 is 69698682.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 268075 + ... + 268181.

It is an arithmetic number, because the mean of its divisors is an integer number (466830).

Almost surely, 2^28689696 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 28689696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50417640).

28689696 is an abundant number, since it is smaller than the sum of its proper divisors (72145584).

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

28689696 is a wasteful number, since it uses less digits than its factorization.

28689696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 138 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 28689696 is about 5356.2763184884. The cubic root of 28689696 is about 306.1319436119.

The spelling of 28689696 in words is "twenty-eight million, six hundred eighty-nine thousand, six hundred ninety-six".