18028634 has 8 divisors (see below), whose sum is σ = 29123220. Its totient is φ = 8320896.

The previous prime is 18028631. The next prime is 18028667. The reversal of 18028634 is 43682081.

It can be written as a sum of positive squares in 2 ways, for example, as 16785409 + 1243225 = 4097^2 + 1115^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18028634.

It is not an unprimeable number, because it can be changed into a prime (18028631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346679 + ... + 346730.

Almost surely, 2^18028634 is an apocalyptic number.

18028634 is a deficient number, since it is larger than the sum of its proper divisors (11094586).

18028634 is a wasteful number, since it uses less digits than its factorization.

18028634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693424.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18028634 is about 4246.0138954083. The cubic root of 18028634 is about 262.2130330363.

The spelling of 18028634 in words is "eighteen million, twenty-eight thousand, six hundred thirty-four".