28144116 has 216 divisors, whose sum is σ = 97598592. Its totient is φ = 6652800.

The previous prime is 28144093. The next prime is 28144139. The reversal of 28144116 is 61144182.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28144093) and next prime (28144139).

It is a self number, because there is not a number n which added to its sum of digits gives 28144116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 396361 + ... + 396431.

Almost surely, 2^28144116 is an apocalyptic number.

28144116 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28144116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48799296).

28144116 is an abundant number, since it is smaller than the sum of its proper divisors (69454476).

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

28144116 is a wasteful number, since it uses less digits than its factorization.

28144116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 107 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 28144116 is about 5305.1028265247. The cubic root of 28144116 is about 304.1789833590.

Adding to 28144116 its reverse (61144182), we get a palindrome (89288298).

The spelling of 28144116 in words is "twenty-eight million, one hundred forty-four thousand, one hundred sixteen".