30165212440 has 128 divisors (see below), whose sum is σ = 78037344000. Its totient is φ = 10378713600.

The previous prime is 30165212353. The next prime is 30165212461. The reversal of 30165212440 is 4421256103.

It is a junction number, because it is equal to n+sod(n) for n = 30165212399 and 30165212408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8517070 + ... + 8520610.

It is an arithmetic number, because the mean of its divisors is an integer number (609666750).

Almost surely, 2^30165212440 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 30165212440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39018672000).

30165212440 is an abundant number, since it is smaller than the sum of its proper divisors (47872131560).

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

30165212440 is a wasteful number, since it uses less digits than its factorization.

30165212440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601 (or 4597 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 30165212440 its reverse (4421256103), we get a palindrome (34586468543).

The spelling of 30165212440 in words is "thirty billion, one hundred sixty-five million, two hundred twelve thousand, four hundred forty".