30305239056 has 135 divisors (see below), whose sum is σ = 86305699389. Its totient is φ = 9926966016.

The previous prime is 30305239049. The next prime is 30305239099. The reversal of 30305239056 is 65093250303.

The square root of 30305239056 is 174084.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5819248656 + 24485990400 = 76284^2 + 156480^2 .

It is a super-2 number, since 2×30305239056² (a number of 22 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 30305239056.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 185921631 + ... + 185921793.

Almost surely, 2^30305239056 is an apocalyptic number.

30305239056 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

30305239056 is the 174084-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30305239056

30305239056 is an abundant number, since it is smaller than the sum of its proper divisors (56000460333).

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

30305239056 is an equidigital number, since it uses as much as digits as its factorization.

30305239056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 36.

Multiplying 30305239056 by its sum of digits (36), we get a square (1090988606016 = 1044504²).

30305239056 divided by its sum of digits (36) gives a square (841812196 = 29014²).

Adding to 30305239056 its reverse (65093250303), we get a palindrome (95398489359).

It can be divided in two parts, 30305 and 239056, that added together give a square (269361 = 519²).

The spelling of 30305239056 in words is "thirty billion, three hundred five million, two hundred thirty-nine thousand, fifty-six".