28676138 has 8 divisors (see below), whose sum is σ = 44063460. Its totient is φ = 13988320.

The previous prime is 28676129. The next prime is 28676143. The reversal of 28676138 is 83167682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28376929 + 299209 = 5327^2 + 547^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 28676095 and 28676104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174773 + ... + 174936.

Almost surely, 2^28676138 is an apocalyptic number.

28676138 is a deficient number, since it is larger than the sum of its proper divisors (15387322).

28676138 is a wasteful number, since it uses less digits than its factorization.

28676138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349752.

The product of its digits is 96768, while the sum is 41.

The square root of 28676138 is about 5355.0105508766. The cubic root of 28676138 is about 306.0837126968.

The spelling of 28676138 in words is "twenty-eight million, six hundred seventy-six thousand, one hundred thirty-eight".