28531713 has 16 divisors (see below), whose sum is σ = 44191616. Its totient is φ = 16035840.

The previous prime is 28531703. The next prime is 28531717. The reversal of 28531713 is 31713582.

It is a de Polignac number, because none of the positive numbers 2^k-28531713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28531717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9856 + ... + 12417.

It is an arithmetic number, because the mean of its divisors is an integer number (2761976).

Almost surely, 2^28531713 is an apocalyptic number.

It is an amenable number.

28531713 is a deficient number, since it is larger than the sum of its proper divisors (15659903).

28531713 is a wasteful number, since it uses less digits than its factorization.

28531713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22344.

The product of its digits is 5040, while the sum is 30.

The square root of 28531713 is about 5341.5084947981. The cubic root of 28531713 is about 305.5689925012.

The spelling of 28531713 in words is "twenty-eight million, five hundred thirty-one thousand, seven hundred thirteen".