28636976 has 40 divisors (see below), whose sum is σ = 59281920. Its totient is φ = 13353984.

The previous prime is 28636967. The next prime is 28636997. The reversal of 28636976 is 67963682.

It is a self number, because there is not a number n which added to its sum of digits gives 28636976.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34130 + ... + 34958.

It is an arithmetic number, because the mean of its divisors is an integer number (1482048).

Almost surely, 2^28636976 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 28636976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29640960).

28636976 is an abundant number, since it is smaller than the sum of its proper divisors (30644944).

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

28636976 is a wasteful number, since it uses less digits than its factorization.

28636976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981 (or 975 counting only the distinct ones).

The product of its digits is 653184, while the sum is 47.

The square root of 28636976 is about 5351.3527261805. The cubic root of 28636976 is about 305.9443132750.

The spelling of 28636976 in words is "twenty-eight million, six hundred thirty-six thousand, nine hundred seventy-six".