28366423 has 4 divisors (see below), whose sum is σ = 28484368. Its totient is φ = 28248480.

The previous prime is 28366399. The next prime is 28366441. The reversal of 28366423 is 32466382.

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-28366423 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 (28366463) 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, 58611 + ... + 59092.

It is an arithmetic number, because the mean of its divisors is an integer number (7121092).

Almost surely, 2^28366423 is an apocalyptic number.

28366423 is a deficient number, since it is larger than the sum of its proper divisors (117945).

28366423 is a wasteful number, since it uses less digits than its factorization.

28366423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117944.

The product of its digits is 41472, while the sum is 34.

The square root of 28366423 is about 5326.0138002074. The cubic root of 28366423 is about 304.9777749639.

The spelling of 28366423 in words is "twenty-eight million, three hundred sixty-six thousand, four hundred twenty-three".