28297384 has 64 divisors (see below), whose sum is σ = 60652800. Its totient is φ = 12294144.

The previous prime is 28297369. The next prime is 28297387. The reversal of 28297384 is 48379282.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28297384.

It is not an unprimeable number, because it can be changed into a prime (28297387) 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 15 ways as a sum of consecutive naturals, for example, 121332 + ... + 121564.

It is an arithmetic number, because the mean of its divisors is an integer number (947700).

Almost surely, 2^28297384 is an apocalyptic number.

It is an amenable number.

28297384 is an abundant number, since it is smaller than the sum of its proper divisors (32355416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28297384 is a wasteful number, since it uses less digits than its factorization.

28297384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 318 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 28297384 is about 5319.5285505390. The cubic root of 28297384 is about 304.7301527963.

The spelling of 28297384 in words is "twenty-eight million, two hundred ninety-seven thousand, three hundred eighty-four".