28275969 has 8 divisors (see below), whose sum is σ = 37727872. Its totient is φ = 18837360.

The previous prime is 28275967. The next prime is 28275979. The reversal of 28275969 is 96957282.

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

It is not a de Polignac number, because 28275969 - 2¹ = 28275967 is a prime.

It is a super-2 number, since 2×28275969² = 1599060845777922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28275967) 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, 3864 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (4715984).

Almost surely, 2^28275969 is an apocalyptic number.

It is an amenable number.

28275969 is a deficient number, since it is larger than the sum of its proper divisors (9451903).

28275969 is a wasteful number, since it uses less digits than its factorization.

28275969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647.

The product of its digits is 544320, while the sum is 48.

The square root of 28275969 is about 5317.5153032220. The cubic root of 28275969 is about 304.6532617885.

The spelling of 28275969 in words is "twenty-eight million, two hundred seventy-five thousand, nine hundred sixty-nine".