28312056 has 48 divisors (see below), whose sum is σ = 77836200. Its totient is φ = 9294912.

The previous prime is 28312051. The next prime is 28312079. The reversal of 28312056 is 65021382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28312051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1890 + ... + 7758.

Almost surely, 2^28312056 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 28312056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38918100).

28312056 is an abundant number, since it is smaller than the sum of its proper divisors (49524144).

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

28312056 is a wasteful number, since it uses less digits than its factorization.

28312056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5948 (or 5941 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 28312056 is about 5320.9074414051. The cubic root of 28312056 is about 304.7828105296.

The spelling of 28312056 in words is "twenty-eight million, three hundred twelve thousand, fifty-six".