28499272 has 8 divisors (see below), whose sum is σ = 53436150. Its totient is φ = 14249632.

The previous prime is 28499269. The next prime is 28499291. The reversal of 28499272 is 27299482.

It can be written as a sum of positive squares in only one way, i.e., 26687556 + 1811716 = 5166^2 + 1346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1781197 + ... + 1781212.

Almost surely, 2^28499272 is an apocalyptic number.

It is an amenable number.

28499272 is a deficient number, since it is larger than the sum of its proper divisors (24936878).

28499272 is a wasteful number, since it uses less digits than its factorization.

28499272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562415 (or 3562411 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 28499272 is about 5338.4709421331. The cubic root of 28499272 is about 305.4531363528.

It can be divided in two parts, 2849 and 9272, that added together give a palindrome (12121).

The spelling of 28499272 in words is "twenty-eight million, four hundred ninety-nine thousand, two hundred seventy-two".