28297318 has 8 divisors (see below), whose sum is σ = 48509712. Its totient is φ = 12127416.

The previous prime is 28297309. The next prime is 28297319. The reversal of 28297318 is 81379282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010605 + ... + 1010632.

It is an arithmetic number, because the mean of its divisors is an integer number (6063714).

Almost surely, 2^28297318 is an apocalyptic number.

28297318 is a deficient number, since it is larger than the sum of its proper divisors (20212394).

28297318 is a wasteful number, since it uses less digits than its factorization.

28297318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021246.

The product of its digits is 48384, while the sum is 40.

The square root of 28297318 is about 5319.5223469782. The cubic root of 28297318 is about 304.7299158815.

The spelling of 28297318 in words is "twenty-eight million, two hundred ninety-seven thousand, three hundred eighteen".