28132706 has 16 divisors (see below), whose sum is σ = 48657024. Its totient is φ = 11949504.

The previous prime is 28132661. The next prime is 28132721. The reversal of 28132706 is 60723182.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7310 + ... + 10473.

It is an arithmetic number, because the mean of its divisors is an integer number (3041064).

Almost surely, 2^28132706 is an apocalyptic number.

28132706 is a deficient number, since it is larger than the sum of its proper divisors (20524318).

28132706 is a wasteful number, since it uses less digits than its factorization.

28132706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17905.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28132706 is about 5304.0273377878. The cubic root of 28132706 is about 304.1378717304.

Adding to 28132706 its reverse (60723182), we get a palindrome (88855888).

The spelling of 28132706 in words is "twenty-eight million, one hundred thirty-two thousand, seven hundred six".