28296457 has 8 divisors (see below), whose sum is σ = 32748800. Its totient is φ = 23946624.

The previous prime is 28296439. The next prime is 28296461. The reversal of 28296457 is 75469282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28296457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28296427) 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 7 ways as a sum of consecutive naturals, for example, 25032 + ... + 26137.

It is an arithmetic number, because the mean of its divisors is an integer number (4093600).

Almost surely, 2^28296457 is an apocalyptic number.

It is an amenable number.

28296457 is a deficient number, since it is larger than the sum of its proper divisors (4452343).

28296457 is an equidigital number, since it uses as much as digits as its factorization.

28296457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51255.

The product of its digits is 241920, while the sum is 43.

The square root of 28296457 is about 5319.4414180438. The cubic root of 28296457 is about 304.7268251867.

The spelling of 28296457 in words is "twenty-eight million, two hundred ninety-six thousand, four hundred fifty-seven".