28735918 has 8 divisors (see below), whose sum is σ = 43171848. Its totient is φ = 14345304.

The previous prime is 28735907. The next prime is 28735919. The reversal of 28735918 is 81953782.

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 (28735919) 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, 9696 + ... + 12307.

It is an arithmetic number, because the mean of its divisors is an integer number (5396481).

Almost surely, 2^28735918 is an apocalyptic number.

28735918 is a deficient number, since it is larger than the sum of its proper divisors (14435930).

28735918 is a wasteful number, since it uses less digits than its factorization.

28735918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22658.

The product of its digits is 120960, while the sum is 43.

The square root of 28735918 is about 5360.5893332730. The cubic root of 28735918 is about 306.2962585684.

The spelling of 28735918 in words is "twenty-eight million, seven hundred thirty-five thousand, nine hundred eighteen".