28618823 has 2 divisors, whose sum is σ = 28618824. Its totient is φ = 28618822.

The previous prime is 28618789. The next prime is 28618829. The reversal of 28618823 is 32881682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28618823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28618829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14309411 + 14309412.

It is an arithmetic number, because the mean of its divisors is an integer number (14309412).

Almost surely, 2^28618823 is an apocalyptic number.

28618823 is a deficient number, since it is larger than the sum of its proper divisors (1).

28618823 is an equidigital number, since it uses as much as digits as its factorization.

28618823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 38.

The square root of 28618823 is about 5349.6563441029. The cubic root of 28618823 is about 305.8796535025.

The spelling of 28618823 in words is "twenty-eight million, six hundred eighteen thousand, eight hundred twenty-three".