30681344 has 18 divisors (see below), whose sum is σ = 61243350. Its totient is φ = 15340544.

The previous prime is 30681341. The next prime is 30681359. The reversal of 30681344 is 44318603.

It can be written as a sum of positive squares in only one way, i.e., 24127744 + 6553600 = 4912^2 + 2560^2 .

It is not an unprimeable number, because it can be changed into a prime (30681341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59669 + ... + 60180.

Almost surely, 2^30681344 is an apocalyptic number.

It is an amenable number.

30681344 is a deficient number, since it is larger than the sum of its proper divisors (30562006).

30681344 is an equidigital number, since it uses as much as digits as its factorization.

30681344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119865 (or 119851 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 30681344 is about 5539.0742908901. The cubic root of 30681344 is about 313.0579905958.

Adding to 30681344 its reverse (44318603), we get a palindrome (74999947).

The spelling of 30681344 in words is "thirty million, six hundred eighty-one thousand, three hundred forty-four".