18028918 has 32 divisors (see below), whose sum is σ = 29859840. Its totient is φ = 8136480.

The previous prime is 18028903. The next prime is 18028919. The reversal of 18028918 is 81982081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66888 + ... + 67156.

It is an arithmetic number, because the mean of its divisors is an integer number (933120).

Almost surely, 2^18028918 is an apocalyptic number.

18028918 is a deficient number, since it is larger than the sum of its proper divisors (11830922).

18028918 is a wasteful number, since it uses less digits than its factorization.

18028918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 18028918 is about 4246.0473384078. The cubic root of 18028918 is about 262.2144098851.

The spelling of 18028918 in words is "eighteen million, twenty-eight thousand, nine hundred eighteen".