28961936 has 20 divisors (see below), whose sum is σ = 57924864. Its totient is φ = 14013600.

The previous prime is 28961929. The next prime is 28961957. The reversal of 28961936 is 63916982.

28961936 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28700 + ... + 29691.

Almost surely, 2^28961936 is an apocalyptic number.

It is an amenable number.

28961936 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28961936 is a wasteful number, since it uses less digits than its factorization.

28961936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58430 (or 58424 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 28961936 is about 5381.6294930067. The cubic root of 28961936 is about 307.0972045567.

The spelling of 28961936 in words is "twenty-eight million, nine hundred sixty-one thousand, nine hundred thirty-six".