28666606 has 4 divisors (see below), whose sum is σ = 42999912. Its totient is φ = 14333302.

The previous prime is 28666591. The next prime is 28666609. The reversal of 28666606 is 60666682.

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 (28666609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7166650 + ... + 7166653.

It is an arithmetic number, because the mean of its divisors is an integer number (10749978).

Almost surely, 2^28666606 is an apocalyptic number.

28666606 is a deficient number, since it is larger than the sum of its proper divisors (14333306).

28666606 is a wasteful number, since it uses less digits than its factorization.

28666606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14333305.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 28666606 is about 5354.1204693208. The cubic root of 28666606 is about 306.0497946790.

The spelling of 28666606 in words is "twenty-eight million, six hundred sixty-six thousand, six hundred six".