28789918 has 8 divisors (see below), whose sum is σ = 43999848. Its totient is φ = 14123304.

The previous prime is 28789903. The next prime is 28789931. The reversal of 28789918 is 81998782.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135696 + ... + 135907.

It is an arithmetic number, because the mean of its divisors is an integer number (5499981).

Almost surely, 2^28789918 is an apocalyptic number.

28789918 is a deficient number, since it is larger than the sum of its proper divisors (15209930).

28789918 is a wasteful number, since it uses less digits than its factorization.

28789918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271658.

The product of its digits is 580608, while the sum is 52.

The square root of 28789918 is about 5365.6237288874. The cubic root of 28789918 is about 306.4880005805.

The spelling of 28789918 in words is "twenty-eight million, seven hundred eighty-nine thousand, nine hundred eighteen".