28678706 has 16 divisors (see below), whose sum is σ = 49242816. Its totient is φ = 12271056.

The previous prime is 28678697. The next prime is 28678717. The reversal of 28678706 is 60787682.

It is a happy number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 10340 + ... + 12816.

It is an arithmetic number, because the mean of its divisors is an integer number (3077676).

Almost surely, 2^28678706 is an apocalyptic number.

28678706 is a deficient number, since it is larger than the sum of its proper divisors (20564110).

28678706 is a wasteful number, since it uses less digits than its factorization.

28678706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 28678706 is about 5355.2503209467. The cubic root of 28678706 is about 306.0928492074.

The spelling of 28678706 in words is "twenty-eight million, six hundred seventy-eight thousand, seven hundred six".