28650823 has 4 divisors (see below), whose sum is σ = 28690128. Its totient is φ = 28611520.

The previous prime is 28650799. The next prime is 28650829. The reversal of 28650823 is 32805682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28650823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28650829) 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, 18538 + ... + 20023.

It is an arithmetic number, because the mean of its divisors is an integer number (7172532).

Almost surely, 2^28650823 is an apocalyptic number.

28650823 is a deficient number, since it is larger than the sum of its proper divisors (39305).

28650823 is an equidigital number, since it uses as much as digits as its factorization.

28650823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39304.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28650823 is about 5352.6463548417. The cubic root of 28650823 is about 305.9936169942.

The spelling of 28650823 in words is "twenty-eight million, six hundred fifty thousand, eight hundred twenty-three".