28152449 has 16 divisors (see below), whose sum is σ = 31485888. Its totient is φ = 25002432.

The previous prime is 28152409. The next prime is 28152479. The reversal of 28152449 is 94425182.

It is not a de Polignac number, because 28152449 - 2¹⁶ = 28086913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28152409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51194 + ... + 51740.

It is an arithmetic number, because the mean of its divisors is an integer number (1967868).

Almost surely, 2^28152449 is an apocalyptic number.

It is an amenable number.

28152449 is a deficient number, since it is larger than the sum of its proper divisors (3333439).

28152449 is a wasteful number, since it uses less digits than its factorization.

28152449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704.

The product of its digits is 23040, while the sum is 35.

The square root of 28152449 is about 5305.8881443167. Note that the first 3 decimals coincide. The cubic root of 28152449 is about 304.2090011591.

The spelling of 28152449 in words is "twenty-eight million, one hundred fifty-two thousand, four hundred forty-nine".