28263713 has 4 divisors (see below), whose sum is σ = 28292628. Its totient is φ = 28234800.

The previous prime is 28263709. The next prime is 28263721. The reversal of 28263713 is 31736282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10387729 + 17875984 = 3223^2 + 4228^2 .

It is a cyclic number.

It is not a de Polignac number, because 28263713 - 2² = 28263709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28263713.

It is not an unprimeable number, because it can be changed into a prime (28263733) 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, 12938 + ... + 14963.

It is an arithmetic number, because the mean of its divisors is an integer number (7073157).

Almost surely, 2^28263713 is an apocalyptic number.

It is an amenable number.

28263713 is a deficient number, since it is larger than the sum of its proper divisors (28915).

28263713 is a wasteful number, since it uses less digits than its factorization.

28263713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28914.

The product of its digits is 12096, while the sum is 32.

The square root of 28263713 is about 5316.3627603842. The cubic root of 28263713 is about 304.6092388943.

Adding to 28263713 its reverse (31736282), we get a palindrome (59999995).

The spelling of 28263713 in words is "twenty-eight million, two hundred sixty-three thousand, seven hundred thirteen".