18028898 has 4 divisors (see below), whose sum is σ = 27043350. Its totient is φ = 9014448.

The previous prime is 18028897. The next prime is 18028903. The reversal of 18028898 is 89882081.

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., 17952169 + 76729 = 4237^2 + 277^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18028897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4507223 + ... + 4507226.

Almost surely, 2^18028898 is an apocalyptic number.

18028898 is a deficient number, since it is larger than the sum of its proper divisors (9014452).

18028898 is an equidigital number, since it uses as much as digits as its factorization.

18028898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9014451.

The product of its (nonzero) digits is 73728, while the sum is 44.

The square root of 18028898 is about 4246.0449832756. The cubic root of 18028898 is about 262.2143129244.

The spelling of 18028898 in words is "eighteen million, twenty-eight thousand, eight hundred ninety-eight".