28397312 has 18 divisors (see below), whose sum is σ = 56684208. Its totient is φ = 14198528.

The previous prime is 28397311. The next prime is 28397323. The reversal of 28397312 is 21379382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28397311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55208 + ... + 55719.

Almost surely, 2^28397312 is an apocalyptic number.

It is an amenable number.

28397312 is a deficient number, since it is larger than the sum of its proper divisors (28286896).

28397312 is an equidigital number, since it uses as much as digits as its factorization.

28397312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110943 (or 110929 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 28397312 is about 5328.9128347159. The cubic root of 28397312 is about 305.0884344474.

The spelling of 28397312 in words is "twenty-eight million, three hundred ninety-seven thousand, three hundred twelve".