28848997 has 4 divisors (see below), whose sum is σ = 29843820. Its totient is φ = 27854176.

The previous prime is 28848991. The next prime is 28849027. The reversal of 28848997 is 79984882.

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 24295041 + 4553956 = 4929^2 + 2134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28848997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28848991) 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, 497368 + ... + 497425.

It is an arithmetic number, because the mean of its divisors is an integer number (7460955).

Almost surely, 2^28848997 is an apocalyptic number.

It is an amenable number.

28848997 is a deficient number, since it is larger than the sum of its proper divisors (994823).

28848997 is an equidigital number, since it uses as much as digits as its factorization.

28848997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994822.

The product of its digits is 2322432, while the sum is 55.

The square root of 28848997 is about 5371.1262319927. The cubic root of 28848997 is about 306.6975025441.

It can be divided in two parts, 2884 and 8997, that added together give a square (11881 = 109²).

The spelling of 28848997 in words is "twenty-eight million, eight hundred forty-eight thousand, nine hundred ninety-seven".