28299872 has 12 divisors (see below), whose sum is σ = 55715436. Its totient is φ = 14149920.

The previous prime is 28299871. The next prime is 28299877. The reversal of 28299872 is 27899282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28299871) 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 as a sum of consecutive naturals, namely, 442154 + ... + 442217.

It is an arithmetic number, because the mean of its divisors is an integer number (4642953).

Almost surely, 2^28299872 is an apocalyptic number.

It is an amenable number.

28299872 is a deficient number, since it is larger than the sum of its proper divisors (27415564).

28299872 is an equidigital number, since it uses as much as digits as its factorization.

28299872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884381 (or 884373 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 28299872 is about 5319.7624007093. The cubic root of 28299872 is about 304.7390834970.

The spelling of 28299872 in words is "twenty-eight million, two hundred ninety-nine thousand, eight hundred seventy-two".