28123713 has 8 divisors (see below), whose sum is σ = 41664800. Its totient is φ = 18749124.

The previous prime is 28123703. The next prime is 28123721. The reversal of 28123713 is 31732182.

It is not a de Polignac number, because 28123713 - 2⁹ = 28123201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1041619 = 28123713 / (2 + 8 + 1 + 2 + 3 + 7 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28123703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520783 + ... + 520836.

It is an arithmetic number, because the mean of its divisors is an integer number (5208100).

Almost surely, 2^28123713 is an apocalyptic number.

It is an amenable number.

28123713 is a deficient number, since it is larger than the sum of its proper divisors (13541087).

28123713 is a wasteful number, since it uses less digits than its factorization.

28123713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041628 (or 1041622 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 28123713 is about 5303.1795179873. The cubic root of 28123713 is about 304.1054610152.

Adding to 28123713 its reverse (31732182), we get a palindrome (59855895).

The spelling of 28123713 in words is "twenty-eight million, one hundred twenty-three thousand, seven hundred thirteen".