28890418 has 8 divisors (see below), whose sum is σ = 43390512. Its totient is φ = 14426916.

The previous prime is 28890413. The next prime is 28890437. The reversal of 28890418 is 81409882.

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

It is not an unprimeable number, because it can be changed into a prime (28890413) 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 3 ways as a sum of consecutive naturals, for example, 7080 + ... + 10387.

It is an arithmetic number, because the mean of its divisors is an integer number (5423814).

Almost surely, 2^28890418 is an apocalyptic number.

28890418 is a deficient number, since it is larger than the sum of its proper divisors (14500094).

28890418 is a wasteful number, since it uses less digits than its factorization.

28890418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18296.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 28890418 is about 5374.9807441516. The cubic root of 28890418 is about 306.8442163930.

The spelling of 28890418 in words is "twenty-eight million, eight hundred ninety thousand, four hundred eighteen".