18898308 has 72 divisors (see below), whose sum is σ = 56137536. Its totient is φ = 5284800.

The previous prime is 18898307. The next prime is 18898309. The reversal of 18898308 is 80389881.

It is an interprime number because it is at equal distance from previous prime (18898307) and next prime (18898309).

It is not an unprimeable number, because it can be changed into a prime (18898307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3313 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (779688).

Almost surely, 2^18898308 is an apocalyptic number.

18898308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18898308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28068768).

18898308 is an abundant number, since it is smaller than the sum of its proper divisors (37239228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18898308 is a wasteful number, since it uses less digits than its factorization.

18898308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 18898308 is about 4347.2184210136. The cubic root of 18898308 is about 266.3632514307.

The spelling of 18898308 in words is "eighteen million, eight hundred ninety-eight thousand, three hundred eight".