30018396 has 96 divisors (see below), whose sum is σ = 78829632. Its totient is φ = 8847360.

The previous prime is 30018377. The next prime is 30018397. The reversal of 30018396 is 69381003.

It is a super-2 number, since 2×30018396² = 1802208196825632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30018397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309420 + ... + 309516.

It is an arithmetic number, because the mean of its divisors is an integer number (821142).

Almost surely, 2^30018396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30018396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39414816).

30018396 is an abundant number, since it is smaller than the sum of its proper divisors (48811236).

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

30018396 is a wasteful number, since it uses less digits than its factorization.

30018396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 30018396 is about 5478.9046350525. The cubic root of 30018396 is about 310.7867494504.

Adding to 30018396 its reverse (69381003), we get a palindrome (99399399).

The spelling of 30018396 in words is "thirty million, eighteen thousand, three hundred ninety-six".