30818216 has 96 divisors (see below), whose sum is σ = 71500800. Its totient is φ = 12355200.

The previous prime is 30818197. The next prime is 30818233. The reversal of 30818216 is 61281803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390065 + ... + 390143.

It is an arithmetic number, because the mean of its divisors is an integer number (744800).

Almost surely, 2^30818216 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 30818216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35750400).

30818216 is an abundant number, since it is smaller than the sum of its proper divisors (40682584).

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

30818216 is a wasteful number, since it uses less digits than its factorization.

30818216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 30818216 is about 5551.4156753030. The cubic root of 30818216 is about 313.5228258747.

The spelling of 30818216 in words is "thirty million, eight hundred eighteen thousand, two hundred sixteen".