28872953 has 4 divisors (see below), whose sum is σ = 30571380. Its totient is φ = 27174528.

The previous prime is 28872917. The next prime is 28872967. The reversal of 28872953 is 35927882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7823209 + 21049744 = 2797^2 + 4588^2 .

It is a cyclic number.

It is not a de Polignac number, because 28872953 - 2¹⁰ = 28871929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28872973) 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, 849188 + ... + 849221.

It is an arithmetic number, because the mean of its divisors is an integer number (7642845).

Almost surely, 2^28872953 is an apocalyptic number.

It is an amenable number.

28872953 is a deficient number, since it is larger than the sum of its proper divisors (1698427).

28872953 is a wasteful number, since it uses less digits than its factorization.

28872953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698426.

The product of its digits is 241920, while the sum is 44.

The square root of 28872953 is about 5373.3558415575. The cubic root of 28872953 is about 306.7823721915.

The spelling of 28872953 in words is "twenty-eight million, eight hundred seventy-two thousand, nine hundred fifty-three".