30103218 has 64 divisors (see below), whose sum is σ = 70848000. Its totient is φ = 9459072.

The previous prime is 30103217. The next prime is 30103231. The reversal of 30103218 is 81230103.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 30103218.

It is not an unprimeable number, because it can be changed into a prime (30103217) 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, 73398 + ... + 73806.

It is an arithmetic number, because the mean of its divisors is an integer number (1107000).

Almost surely, 2^30103218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30103218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35424000).

30103218 is an abundant number, since it is smaller than the sum of its proper divisors (40744782).

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

30103218 is a wasteful number, since it uses less digits than its factorization.

30103218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 30103218 is about 5486.6399553825. The cubic root of 30103218 is about 311.0792008182.

The spelling of 30103218 in words is "thirty million, one hundred three thousand, two hundred eighteen".