30440401212 has 144 divisors (see below), whose sum is σ = 81473850752. Its totient is φ = 8791649280.

The previous prime is 30440401183. The next prime is 30440401219. The reversal of 30440401212 is 21210404403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30440401219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23578287 + ... + 23579577.

Almost surely, 2^30440401212 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 30440401212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40736925376).

30440401212 is an abundant number, since it is smaller than the sum of its proper divisors (51033449540).

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

30440401212 is a wasteful number, since it uses less digits than its factorization.

30440401212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1849 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 30440401212 its reverse (21210404403), we get a palindrome (51650805615).

The spelling of 30440401212 in words is "thirty billion, four hundred forty million, four hundred one thousand, two hundred twelve".