30684285720 has 384 divisors, whose sum is σ = 112778265600. Its totient is φ = 7170508800.

The previous prime is 30684285707. The next prime is 30684285767. The reversal of 30684285720 is 2758248603.

30684285720 is a `hidden beast` number, since 30 + 6 + 8 + 42 + 8 + 572 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13450980 + ... + 13453260.

It is an arithmetic number, because the mean of its divisors is an integer number (293693400).

Almost surely, 2^30684285720 is an apocalyptic number.

30684285720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30684285720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56389132800).

30684285720 is an abundant number, since it is smaller than the sum of its proper divisors (82093979880).

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

30684285720 is a wasteful number, since it uses less digits than its factorization.

30684285720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431 (or 2424 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 30684285720 in words is "thirty billion, six hundred eighty-four million, two hundred eighty-five thousand, seven hundred twenty".