28366951 has 4 divisors (see below), whose sum is σ = 28378504. Its totient is φ = 28355400.

The previous prime is 28366937. The next prime is 28366963. The reversal of 28366951 is 15966382.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28366951 - 2⁷ = 28366823 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 (28366651) 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 3 ways as a sum of consecutive naturals, for example, 465 + ... + 7546.

It is an arithmetic number, because the mean of its divisors is an integer number (7094626).

Almost surely, 2^28366951 is an apocalyptic number.

28366951 is a deficient number, since it is larger than the sum of its proper divisors (11553).

28366951 is an equidigital number, since it uses as much as digits as its factorization.

28366951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11552.

The product of its digits is 77760, while the sum is 40.

The square root of 28366951 is about 5326.0633680046. The cubic root of 28366951 is about 304.9796671924.

The spelling of 28366951 in words is "twenty-eight million, three hundred sixty-six thousand, nine hundred fifty-one".