28415666 has 8 divisors (see below), whose sum is σ = 42802560. Its totient is φ = 14148148.

The previous prime is 28415657. The next prime is 28415693. The reversal of 28415666 is 66651482.

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

It is an unprimeable number.

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, 29246 + ... + 30201.

It is an arithmetic number, because the mean of its divisors is an integer number (5350320).

Almost surely, 2^28415666 is an apocalyptic number.

28415666 is a deficient number, since it is larger than the sum of its proper divisors (14386894).

28415666 is a wasteful number, since it uses less digits than its factorization.

28415666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59688.

The product of its digits is 69120, while the sum is 38.

The square root of 28415666 is about 5330.6346714064. The cubic root of 28415666 is about 305.1541494368.

The spelling of 28415666 in words is "twenty-eight million, four hundred fifteen thousand, six hundred sixty-six".