30679684440 has 128 divisors (see below), whose sum is σ = 100596971520. Its totient is φ = 7451596800.

The previous prime is 30679684381. The next prime is 30679684447. The reversal of 30679684440 is 4448697603.

It is a super-2 number, since 2×30679684440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30679684447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179326 + ... + 305805.

It is an arithmetic number, because the mean of its divisors is an integer number (785913840).

Almost surely, 2^30679684440 is an apocalyptic number.

30679684440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30679684440 is an abundant number, since it is smaller than the sum of its proper divisors (69917287080).

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

30679684440 is a wasteful number, since it uses less digits than its factorization.

30679684440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485193 (or 485189 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 30679684440 in words is "thirty billion, six hundred seventy-nine million, six hundred eighty-four thousand, four hundred forty".