28906056 has 24 divisors (see below), whose sum is σ = 78287430. Its totient is φ = 9635328.

The previous prime is 28906027. The next prime is 28906057. The reversal of 28906056 is 65060982.

It can be written as a sum of positive squares in only one way, i.e., 15729156 + 13176900 = 3966^2 + 3630^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28906056.

It is not an unprimeable number, because it can be changed into a prime (28906057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200665 + ... + 200808.

Almost surely, 2^28906056 is an apocalyptic number.

It is an amenable number.

28906056 is an abundant number, since it is smaller than the sum of its proper divisors (49381374).

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

28906056 is a wasteful number, since it uses less digits than its factorization.

28906056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401485 (or 401478 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 28906056 is about 5376.4352502378. The cubic root of 28906056 is about 306.8995699747.

The spelling of 28906056 in words is "twenty-eight million, nine hundred six thousand, fifty-six".