28671263 has 8 divisors (see below), whose sum is σ = 29513232. Its totient is φ = 27832896.

The previous prime is 28671257. The next prime is 28671277. The reversal of 28671263 is 36217682.

It is a happy number.

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 28671263 - 2⁶ = 28671199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28674263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30131 + ... + 31067.

It is an arithmetic number, because the mean of its divisors is an integer number (3689154).

Almost surely, 2^28671263 is an apocalyptic number.

28671263 is a deficient number, since it is larger than the sum of its proper divisors (841969).

28671263 is an equidigital number, since it uses as much as digits as its factorization.

28671263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801.

The product of its digits is 24192, while the sum is 35.

The square root of 28671263 is about 5354.5553503536. Note that the first 3 decimals coincide. The cubic root of 28671263 is about 306.0663667690.

The spelling of 28671263 in words is "twenty-eight million, six hundred seventy-one thousand, two hundred sixty-three".