28702823 has 2 divisors, whose sum is σ = 28702824. Its totient is φ = 28702822.

The previous prime is 28702813. The next prime is 28702871. The reversal of 28702823 is 32820782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28702823 - 2¹² = 28698727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28702823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28702813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14351411 + 14351412.

It is an arithmetic number, because the mean of its divisors is an integer number (14351412).

Almost surely, 2^28702823 is an apocalyptic number.

28702823 is a deficient number, since it is larger than the sum of its proper divisors (1).

28702823 is an equidigital number, since it uses as much as digits as its factorization.

28702823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28702823 is about 5357.5015632289. The cubic root of 28702823 is about 306.1786268215.

The spelling of 28702823 in words is "twenty-eight million, seven hundred two thousand, eight hundred twenty-three".