30717140 has 12 divisors (see below), whose sum is σ = 64506036. Its totient is φ = 12286848.

The previous prime is 30717139. The next prime is 30717149. The reversal of 30717140 is 4171703.

It can be written as a sum of positive squares in 2 ways, for example, as 15382084 + 15335056 = 3922^2 + 3916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30717149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 767909 + ... + 767948.

It is an arithmetic number, because the mean of its divisors is an integer number (5375503).

Almost surely, 2^30717140 is an apocalyptic number.

It is an amenable number.

30717140 is an abundant number, since it is smaller than the sum of its proper divisors (33788896).

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

30717140 is a wasteful number, since it uses less digits than its factorization.

30717140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535866 (or 1535864 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 30717140 is about 5542.3045748136. The cubic root of 30717140 is about 313.1796917892.

Adding to 30717140 its reverse (4171703), we get a palindrome (34888843).

The spelling of 30717140 in words is "thirty million, seven hundred seventeen thousand, one hundred forty".