30442123440 has 60 divisors (see below), whose sum is σ = 102234800304. Its totient is φ = 8117899392.

The previous prime is 30442123429. The next prime is 30442123447. The reversal of 30442123440 is 4432124403.

It is a happy number.

30442123440 is a `hidden beast` number, since 3 + 0 + 4 + 4 + 212 + 3 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (30442123447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21139644 + ... + 21141083.

Almost surely, 2^30442123440 is an apocalyptic number.

30442123440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30442123440 is an abundant number, since it is smaller than the sum of its proper divisors (71792676864).

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

30442123440 is a wasteful number, since it uses less digits than its factorization.

30442123440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42280746 (or 42280737 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 30442123440 its reverse (4432124403), we get a palindrome (34874247843).

The spelling of 30442123440 in words is "thirty billion, four hundred forty-two million, one hundred twenty-three thousand, four hundred forty".