28736713 has 4 divisors (see below), whose sum is σ = 28748160. Its totient is φ = 28725268.

The previous prime is 28736699. The next prime is 28736731. The reversal of 28736713 is 31763782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28736713 - 2¹⁷ = 28605641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28736413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145 + ... + 7582.

It is an arithmetic number, because the mean of its divisors is an integer number (7187040).

Almost surely, 2^28736713 is an apocalyptic number.

It is an amenable number.

28736713 is a deficient number, since it is larger than the sum of its proper divisors (11447).

28736713 is an equidigital number, since it uses as much as digits as its factorization.

28736713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11446.

The product of its digits is 42336, while the sum is 37.

The square root of 28736713 is about 5360.6634850548. The cubic root of 28736713 is about 306.2990831783.

The spelling of 28736713 in words is "twenty-eight million, seven hundred thirty-six thousand, seven hundred thirteen".