30681349440 has 112 divisors (see below), whose sum is σ = 111329492352. Its totient is φ = 7012878336.

The previous prime is 30681349423. The next prime is 30681349451. The reversal of 30681349440 is 4494318603.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 30681349392 and 30681349401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2276119 + ... + 2289558.

Almost surely, 2^30681349440 is an apocalyptic number.

30681349440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30681349440 is an abundant number, since it is smaller than the sum of its proper divisors (80648142912).

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

30681349440 is a wasteful number, since it uses less digits than its factorization.

30681349440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565704 (or 4565694 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 30681349440 in words is "thirty billion, six hundred eighty-one million, three hundred forty-nine thousand, four hundred forty".