28388018 has 8 divisors (see below), whose sum is σ = 43121280. Its totient is φ = 14014260.

The previous prime is 28387999. The next prime is 28388023. The reversal of 28388018 is 81088382.

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

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, 89678 + ... + 89993.

It is an arithmetic number, because the mean of its divisors is an integer number (5390160).

Almost surely, 2^28388018 is an apocalyptic number.

28388018 is a deficient number, since it is larger than the sum of its proper divisors (14733262).

28388018 is a wasteful number, since it uses less digits than its factorization.

28388018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179752.

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 28388018 is about 5328.0407280726. The cubic root of 28388018 is about 305.0551472440.

The spelling of 28388018 in words is "twenty-eight million, three hundred eighty-eight thousand, eighteen".