28142416 has 20 divisors (see below), whose sum is σ = 55091092. Its totient is φ = 13925376.

The previous prime is 28142399. The next prime is 28142419. The reversal of 28142416 is 61424182.

It can be written as a sum of positive squares in 2 ways, for example, as 12110400 + 16032016 = 3480^2 + 4004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28142419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7515 + ... + 10618.

Almost surely, 2^28142416 is an apocalyptic number.

It is an amenable number.

28142416 is a deficient number, since it is larger than the sum of its proper divisors (26948676).

28142416 is a wasteful number, since it uses less digits than its factorization.

28142416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18238 (or 18232 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 28142416 is about 5304.9426010090. The cubic root of 28142416 is about 304.1728587551.

Adding to 28142416 its reverse (61424182), we get a palindrome (89566598).

It can be divided in two parts, 2 and 8142416, that added together give a palindrome (8142418).

The spelling of 28142416 in words is "twenty-eight million, one hundred forty-two thousand, four hundred sixteen".