30385205280 has 144 divisors (see below), whose sum is σ = 105646184280. Its totient is φ = 7949819904.

The previous prime is 30385205237. The next prime is 30385205293. The reversal of 30385205280 is 8250258303.

30385205280 is a `hidden beast` number, since 3 + 0 + 3 + 8 + 520 + 52 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 29980229904 + 404975376 = 173148^2 + 20124^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 122745 + ... + 275384.

Almost surely, 2^30385205280 is an apocalyptic number.

30385205280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30385205280 is an abundant number, since it is smaller than the sum of its proper divisors (75260979000).

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

30385205280 is a wasteful number, since it uses less digits than its factorization.

30385205280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398203 (or 398192 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 30385205280 in words is "thirty billion, three hundred eighty-five million, two hundred five thousand, two hundred eighty".