28087297 has 8 divisors (see below), whose sum is σ = 32705856. Its totient is φ = 23620272.

The previous prime is 28087291. The next prime is 28087303. The reversal of 28087297 is 79278082.

It is an interprime number because it is at equal distance from previous prime (28087291) and next prime (28087303).

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-28087297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28087291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37483 + ... + 38224.

It is an arithmetic number, because the mean of its divisors is an integer number (4088232).

Almost surely, 2^28087297 is an apocalyptic number.

It is an amenable number.

28087297 is a deficient number, since it is larger than the sum of its proper divisors (4618559).

28087297 is an equidigital number, since it uses as much as digits as its factorization.

28087297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75767.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 28087297 is about 5299.7449938653. The cubic root of 28087297 is about 303.9741472994.

The spelling of 28087297 in words is "twenty-eight million, eighty-seven thousand, two hundred ninety-seven".