28762666 has 8 divisors (see below), whose sum is σ = 43239780. Its totient is φ = 14349408.

The previous prime is 28762663. The next prime is 28762667. The reversal of 28762666 is 66626782.

It can be written as a sum of positive squares in 2 ways, for example, as 27720225 + 1042441 = 5265^2 + 1021^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28762663) 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, 14821 + ... + 16648.

Almost surely, 2^28762666 is an apocalyptic number.

28762666 is a deficient number, since it is larger than the sum of its proper divisors (14477114).

28762666 is a wasteful number, since it uses less digits than its factorization.

28762666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31928.

The product of its digits is 290304, while the sum is 43.

The square root of 28762666 is about 5363.0836279141. The cubic root of 28762666 is about 306.3912647742.

The spelling of 28762666 in words is "twenty-eight million, seven hundred sixty-two thousand, six hundred sixty-six".