30720160 has 48 divisors (see below), whose sum is σ = 73333512. Its totient is φ = 12160000.

The previous prime is 30720143. The next prime is 30720161. The reversal of 30720160 is 6102703.

It can be written as a sum of positive squares in 4 ways, for example, as 25684624 + 5035536 = 5068^2 + 2244^2 .

It is not an unprimeable number, because it can be changed into a prime (30720161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15210 + ... + 17110.

Almost surely, 2^30720160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30720160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36666756).

30720160 is an abundant number, since it is smaller than the sum of its proper divisors (42613352).

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

30720160 is a wasteful number, since it uses less digits than its factorization.

30720160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 30720160 is about 5542.5770179583. The cubic root of 30720160 is about 313.1899550242.

Adding to 30720160 its reverse (6102703), we get a palindrome (36822863).

The spelling of 30720160 in words is "thirty million, seven hundred twenty thousand, one hundred sixty".