28840118 has 4 divisors (see below), whose sum is σ = 43260180. Its totient is φ = 14420058.

The previous prime is 28840117. The next prime is 28840121. The reversal of 28840118 is 81104882.

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 (28840117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7210028 + ... + 7210031.

It is an arithmetic number, because the mean of its divisors is an integer number (10815045).

Almost surely, 2^28840118 is an apocalyptic number.

28840118 is a deficient number, since it is larger than the sum of its proper divisors (14420062).

28840118 is a wasteful number, since it uses less digits than its factorization.

28840118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14420061.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 28840118 is about 5370.2996192019. The cubic root of 28840118 is about 306.6660347078. Note that the first 3 decimals are identical.

The spelling of 28840118 in words is "twenty-eight million, eight hundred forty thousand, one hundred eighteen".