18072898 has 8 divisors (see below), whose sum is σ = 27282492. Its totient is φ = 8978736.

The previous prime is 18072893. The next prime is 18072911. The reversal of 18072898 is 89827081.

It can be written as a sum of positive squares in 2 ways, for example, as 16426809 + 1646089 = 4053^2 + 1283^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18072893) 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, 28465 + ... + 29092.

Almost surely, 2^18072898 is an apocalyptic number.

18072898 is a deficient number, since it is larger than the sum of its proper divisors (9209594).

18072898 is a wasteful number, since it uses less digits than its factorization.

18072898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57716.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 18072898 is about 4251.2231181155. The cubic root of 18072898 is about 262.4274532704.

The spelling of 18072898 in words is "eighteen million, seventy-two thousand, eight hundred ninety-eight".