30443312440 has 64 divisors (see below), whose sum is σ = 71596224000. Its totient is φ = 11628220032.

The previous prime is 30443312429. The next prime is 30443312453. The reversal of 30443312440 is 4421334403.

It is a junction number, because it is equal to n+sod(n) for n = 30443312399 and 30443312408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523459 + ... + 578701.

It is an arithmetic number, because the mean of its divisors is an integer number (1118691000).

Almost surely, 2^30443312440 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 30443312440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35798112000).

30443312440 is an abundant number, since it is smaller than the sum of its proper divisors (41152911560).

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

30443312440 is a wasteful number, since it uses less digits than its factorization.

30443312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55876 (or 55872 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 30443312440 its reverse (4421334403), we get a palindrome (34864646843).

The spelling of 30443312440 in words is "thirty billion, four hundred forty-three million, three hundred twelve thousand, four hundred forty".