28955216 has 20 divisors (see below), whose sum is σ = 59401332. Its totient is φ = 13625856.

The previous prime is 28955203. The next prime is 28955249. The reversal of 28955216 is 61255982.

It can be written as a sum of positive squares in 2 ways, for example, as 23001616 + 5953600 = 4796^2 + 2440^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28955216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52955 + ... + 53498.

Almost surely, 2^28955216 is an apocalyptic number.

It is an amenable number.

28955216 is an abundant number, since it is smaller than the sum of its proper divisors (30446116).

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

28955216 is a wasteful number, since it uses less digits than its factorization.

28955216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106478 (or 106472 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 28955216 is about 5381.0051105718. The cubic root of 28955216 is about 307.0734509324.

The spelling of 28955216 in words is "twenty-eight million, nine hundred fifty-five thousand, two hundred sixteen".