28169897 has 8 divisors (see below), whose sum is σ = 32635776. Its totient is φ = 23814432.

The previous prime is 28169891. The next prime is 28169903. The reversal of 28169897 is 79896182.

It is an interprime number because it is at equal distance from previous prime (28169891) and next prime (28169903).

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

It is a cyclic number.

It is not a de Polignac number, because 28169897 - 2⁴ = 28169881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28169891) 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, 27053 + ... + 28074.

It is an arithmetic number, because the mean of its divisors is an integer number (4079472).

Almost surely, 2^28169897 is an apocalyptic number.

It is an amenable number.

28169897 is a deficient number, since it is larger than the sum of its proper divisors (4465879).

28169897 is an equidigital number, since it uses as much as digits as its factorization.

28169897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55207.

The product of its digits is 435456, while the sum is 50.

The square root of 28169897 is about 5307.5321007037. The cubic root of 28169897 is about 304.2718345617.

The spelling of 28169897 in words is "twenty-eight million, one hundred sixty-nine thousand, eight hundred ninety-seven".