28620823 has 8 divisors (see below), whose sum is σ = 35683200. Its totient is φ = 22301880.

The previous prime is 28620817. The next prime is 28620827. The reversal of 28620823 is 32802682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28620823 - 2⁹ = 28620311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185773 + ... + 185926.

It is an arithmetic number, because the mean of its divisors is an integer number (4460400).

Almost surely, 2^28620823 is an apocalyptic number.

28620823 is a deficient number, since it is larger than the sum of its proper divisors (7062377).

28620823 is a wasteful number, since it uses less digits than its factorization.

28620823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371717.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28620823 is about 5349.8432687323. The cubic root of 28620823 is about 305.8867787089.

The spelling of 28620823 in words is "twenty-eight million, six hundred twenty thousand, eight hundred twenty-three".