28671523 has 2 divisors, whose sum is σ = 28671524. Its totient is φ = 28671522.

The previous prime is 28671521. The next prime is 28671527. The reversal of 28671523 is 32517682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28671523 - 2¹ = 28671521 is a prime.

It is a super-2 number, since 2×28671523² = 1644112462279058, which contains 22 as substring.

Together with 28671521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28671521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14335761 + 14335762.

It is an arithmetic number, because the mean of its divisors is an integer number (14335762).

Almost surely, 2^28671523 is an apocalyptic number.

28671523 is a deficient number, since it is larger than the sum of its proper divisors (1).

28671523 is an equidigital number, since it uses as much as digits as its factorization.

28671523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 28671523 is about 5354.5796286917. The cubic root of 28671523 is about 306.0672919347.

The spelling of 28671523 in words is "twenty-eight million, six hundred seventy-one thousand, five hundred twenty-three".