28840116 has 12 divisors (see below), whose sum is σ = 67293632. Its totient is φ = 9613368.

The previous prime is 28840099. The next prime is 28840117. The reversal of 28840116 is 61104882.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201660 + ... + 1201683.

Almost surely, 2^28840116 is an apocalyptic number.

It is an amenable number.

28840116 is an abundant number, since it is smaller than the sum of its proper divisors (38453516).

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

28840116 is a wasteful number, since it uses less digits than its factorization.

28840116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403350 (or 2403348 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28840116 is about 5370.2994329925. The cubic root of 28840116 is about 306.6660276189. Note that the first 3 decimals are identical.

Adding to 28840116 its reverse (61104882), we get a palindrome (89944998).

It can be divided in two parts, 288 and 40116, that added together give a palindrome (40404).

The spelling of 28840116 in words is "twenty-eight million, eight hundred forty thousand, one hundred sixteen".