30706985840 has 20 divisors (see below), whose sum is σ = 71393742264. Its totient is φ = 12282794304.

The previous prime is 30706985809. The next prime is 30706985851. The reversal of 30706985840 is 4858960703.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191918582 + ... + 191918741.

Almost surely, 2^30706985840 is an apocalyptic number.

It is an amenable number.

30706985840 is an abundant number, since it is smaller than the sum of its proper divisors (40686756424).

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

30706985840 is a wasteful number, since it uses less digits than its factorization.

30706985840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383837336 (or 383837330 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 30706985840 in words is "thirty billion, seven hundred six million, nine hundred eighty-five thousand, eight hundred forty".