28145716 has 24 divisors (see below), whose sum is σ = 50205960. Its totient is φ = 13804032.

The previous prime is 28145687. The next prime is 28145717. The reversal of 28145716 is 61754182.

It can be written as a sum of positive squares in 4 ways, for example, as 10890000 + 17255716 = 3300^2 + 4154^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28145717) 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 7 ways as a sum of consecutive naturals, for example, 61360 + ... + 61816.

It is an arithmetic number, because the mean of its divisors is an integer number (2091915).

Almost surely, 2^28145716 is an apocalyptic number.

It is an amenable number.

28145716 is a deficient number, since it is larger than the sum of its proper divisors (22060244).

28145716 is a wasteful number, since it uses less digits than its factorization.

28145716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 721 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 28145716 is about 5305.2536225896. The cubic root of 28145716 is about 304.1847474667.

Adding to 28145716 its reverse (61754182), we get a palindrome (89899898).

The spelling of 28145716 in words is "twenty-eight million, one hundred forty-five thousand, seven hundred sixteen".