28736678 has 4 divisors (see below), whose sum is σ = 43105020. Its totient is φ = 14368338.

The previous prime is 28736677. The next prime is 28736699. The reversal of 28736678 is 87663782.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28736677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7184168 + ... + 7184171.

It is an arithmetic number, because the mean of its divisors is an integer number (10776255).

Almost surely, 2^28736678 is an apocalyptic number.

28736678 is a deficient number, since it is larger than the sum of its proper divisors (14368342).

28736678 is a wasteful number, since it uses less digits than its factorization.

28736678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14368341.

The product of its digits is 677376, while the sum is 47.

The square root of 28736678 is about 5360.6602205325. The cubic root of 28736678 is about 306.2989588255.

The spelling of 28736678 in words is "twenty-eight million, seven hundred thirty-six thousand, six hundred seventy-eight".