30406968240 has 80 divisors (see below), whose sum is σ = 102830846976. Its totient is φ = 7371385600.

The previous prime is 30406968223. The next prime is 30406968341. The reversal of 30406968240 is 4286960403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 30406968192 and 30406968201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5756256 + ... + 5761535.

Almost surely, 2^30406968240 is an apocalyptic number.

30406968240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30406968240 is an abundant number, since it is smaller than the sum of its proper divisors (72423878736).

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

30406968240 is a wasteful number, since it uses less digits than its factorization.

30406968240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11517818 (or 11517812 counting only the distinct ones).

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

The spelling of 30406968240 in words is "thirty billion, four hundred six million, nine hundred sixty-eight thousand, two hundred forty".