28237866 has 8 divisors (see below), whose sum is σ = 56475744. Its totient is φ = 9412620.

The previous prime is 28237849. The next prime is 28237873. The reversal of 28237866 is 66873282.

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

28237866 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2353150 + ... + 2353161.

It is an arithmetic number, because the mean of its divisors is an integer number (7059468).

Almost surely, 2^28237866 is an apocalyptic number.

28237866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28237866 is a wasteful number, since it uses less digits than its factorization.

28237866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706316.

The product of its digits is 193536, while the sum is 42.

The square root of 28237866 is about 5313.9313130676. The cubic root of 28237866 is about 304.5163561200.

The spelling of 28237866 in words is "twenty-eight million, two hundred thirty-seven thousand, eight hundred sixty-six".