28534018 has 4 divisors (see below), whose sum is σ = 42801030. Its totient is φ = 14267008.

The previous prime is 28534003. The next prime is 28534061. The reversal of 28534018 is 81043582.

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

It can be written as a sum of positive squares in only one way, i.e., 15233409 + 13300609 = 3903^2 + 3647^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 7133503 + ... + 7133506.

Almost surely, 2^28534018 is an apocalyptic number.

28534018 is a deficient number, since it is larger than the sum of its proper divisors (14267012).

28534018 is a wasteful number, since it uses less digits than its factorization.

28534018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14267011.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28534018 is about 5341.7242534597. The cubic root of 28534018 is about 305.5772209774.

The spelling of 28534018 in words is "twenty-eight million, five hundred thirty-four thousand, eighteen".