28732678 has 32 divisors (see below), whose sum is σ = 48988800. Its totient is φ = 12544896.

The previous prime is 28732673. The next prime is 28732679. The reversal of 28732678 is 87623782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28732673) 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 15 ways as a sum of consecutive naturals, for example, 39603 + ... + 40321.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^28732678 is an apocalyptic number.

28732678 is a deficient number, since it is larger than the sum of its proper divisors (20256122).

28732678 is a wasteful number, since it uses less digits than its factorization.

28732678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its digits is 225792, while the sum is 43.

The square root of 28732678 is about 5360.2871191756. The cubic root of 28732678 is about 306.2847464116.

The spelling of 28732678 in words is "twenty-eight million, seven hundred thirty-two thousand, six hundred seventy-eight".