28312116 has 24 divisors (see below), whose sum is σ = 75499200. Its totient is φ = 8089152.

The previous prime is 28312079. The next prime is 28312117. The reversal of 28312116 is 61121382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28312117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168441 + ... + 168608.

It is an arithmetic number, because the mean of its divisors is an integer number (3145800).

Almost surely, 2^28312116 is an apocalyptic number.

It is an amenable number.

28312116 is an abundant number, since it is smaller than the sum of its proper divisors (47187084).

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

28312116 is a wasteful number, since it uses less digits than its factorization.

28312116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337063 (or 337061 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 28312116 is about 5320.9130795381. The cubic root of 28312116 is about 304.7830258319.

Adding to 28312116 its reverse (61121382), we get a palindrome (89433498).

The spelling of 28312116 in words is "twenty-eight million, three hundred twelve thousand, one hundred sixteen".