28538318 has 4 divisors (see below), whose sum is σ = 42807480. Its totient is φ = 14269158.

The previous prime is 28538317. The next prime is 28538329. The reversal of 28538318 is 81383582.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28538311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7134578 + ... + 7134581.

It is an arithmetic number, because the mean of its divisors is an integer number (10701870).

Almost surely, 2^28538318 is an apocalyptic number.

28538318 is a deficient number, since it is larger than the sum of its proper divisors (14269162).

28538318 is a wasteful number, since it uses less digits than its factorization.

28538318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14269161.

The product of its digits is 46080, while the sum is 38.

The square root of 28538318 is about 5342.1267300580. The cubic root of 28538318 is about 305.5925700957.

The spelling of 28538318 in words is "twenty-eight million, five hundred thirty-eight thousand, three hundred eighteen".