28047766 has 4 divisors (see below), whose sum is σ = 42071652. Its totient is φ = 14023882.

The previous prime is 28047763. The next prime is 28047793. The reversal of 28047766 is 66774082.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28047763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7011940 + ... + 7011943.

It is an arithmetic number, because the mean of its divisors is an integer number (10517913).

Almost surely, 2^28047766 is an apocalyptic number.

28047766 is a deficient number, since it is larger than the sum of its proper divisors (14023886).

28047766 is a wasteful number, since it uses less digits than its factorization.

28047766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023885.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 28047766 is about 5296.0141616125. The cubic root of 28047766 is about 303.8314725539.

The spelling of 28047766 in words is "twenty-eight million, forty-seven thousand, seven hundred sixty-six".