28397296 has 20 divisors (see below), whose sum is σ = 55105600. Its totient is φ = 14176512.

The previous prime is 28397251. The next prime is 28397309. The reversal of 28397296 is 69279382.

It is a super-2 number, since 2×28397296² = 1612812840223232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 15265 + ... + 17023.

It is an arithmetic number, because the mean of its divisors is an integer number (2755280).

Almost surely, 2^28397296 is an apocalyptic number.

It is an amenable number.

28397296 is a deficient number, since it is larger than the sum of its proper divisors (26708304).

28397296 is a wasteful number, since it uses less digits than its factorization.

28397296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776 (or 2770 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 28397296 is about 5328.9113334714. The cubic root of 28397296 is about 305.0883771484.

It can be divided in two parts, 283 and 97296, that added together give a palindrome (97579).

The spelling of 28397296 in words is "twenty-eight million, three hundred ninety-seven thousand, two hundred ninety-six".