28955772 has 96 divisors (see below), whose sum is σ = 80371200. Its totient is φ = 8989056.

The previous prime is 28955737. The next prime is 28955819. The reversal of 28955772 is 27755982.

It is a happy number.

28955772 is a `hidden beast` number, since 28 + 9 + 557 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211288 + ... + 211424.

It is an arithmetic number, because the mean of its divisors is an integer number (837200).

Almost surely, 2^28955772 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 28955772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40185600).

28955772 is an abundant number, since it is smaller than the sum of its proper divisors (51415428).

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

28955772 is a wasteful number, since it uses less digits than its factorization.

28955772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 264 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 28955772 is about 5381.0567735344. The cubic root of 28955772 is about 307.0754164014.

The spelling of 28955772 in words is "twenty-eight million, nine hundred fifty-five thousand, seven hundred seventy-two".