30216340 has 72 divisors (see below), whose sum is σ = 80553312. Its totient is φ = 9414720.

The previous prime is 30216337. The next prime is 30216349. The reversal of 30216340 is 4361203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30216349) 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, 9379 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (1118796).

Almost surely, 2^30216340 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 30216340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40276656).

30216340 is an abundant number, since it is smaller than the sum of its proper divisors (50336972).

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

30216340 is a wasteful number, since it uses less digits than its factorization.

30216340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837 (or 2828 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 30216340 is about 5496.9391482897. The cubic root of 30216340 is about 311.4683719939.

Adding to 30216340 its reverse (4361203), we get a palindrome (34577543).

It can be divided in two parts, 302163 and 40, that added together give a palindrome (302203).

The spelling of 30216340 in words is "thirty million, two hundred sixteen thousand, three hundred forty".