30440401220 has 96 divisors (see below), whose sum is σ = 68266800000. Its totient is φ = 11368608768.

The previous prime is 30440401219. The next prime is 30440401223. The reversal of 30440401220 is 2210404403.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30440401192 and 30440401201.

It is not an unprimeable number, because it can be changed into a prime (30440401223) 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, 11801891 + ... + 11804469.

It is an arithmetic number, because the mean of its divisors is an integer number (711112500).

Almost surely, 2^30440401220 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 30440401220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34133400000).

30440401220 is an abundant number, since it is smaller than the sum of its proper divisors (37826398780).

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

30440401220 is a wasteful number, since it uses less digits than its factorization.

30440401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045 (or 3043 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 30440401220 its reverse (2210404403), we get a palindrome (32650805623).

The spelling of 30440401220 in words is "thirty billion, four hundred forty million, four hundred one thousand, two hundred twenty".