28723678 has 8 divisors (see below), whose sum is σ = 43815960. Its totient is φ = 14118360.

The previous prime is 28723663. The next prime is 28723679. The reversal of 28723678 is 87632782.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28723679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121593 + ... + 121828.

It is an arithmetic number, because the mean of its divisors is an integer number (5476995).

Almost surely, 2^28723678 is an apocalyptic number.

28723678 is a deficient number, since it is larger than the sum of its proper divisors (15092282).

28723678 is a wasteful number, since it uses less digits than its factorization.

28723678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243482.

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

The square root of 28723678 is about 5359.4475461562. The cubic root of 28723678 is about 306.2527636569.

The spelling of 28723678 in words is "twenty-eight million, seven hundred twenty-three thousand, six hundred seventy-eight".