30689956 has 18 divisors (see below), whose sum is σ = 59034710. Its totient is φ = 13949760.

The previous prime is 30689951. The next prime is 30689957. The reversal of 30689956 is 65998603.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 11329956 = 4400^2 + 3366^2 .

It is not an unprimeable number, because it can be changed into a prime (30689951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31221 + ... + 32188.

Almost surely, 2^30689956 is an apocalyptic number.

It is an amenable number.

30689956 is a deficient number, since it is larger than the sum of its proper divisors (28344754).

30689956 is a wasteful number, since it uses less digits than its factorization.

30689956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63435 (or 63422 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 30689956 is about 5539.8516225617. The cubic root of 30689956 is about 313.0872787869.

It can be divided in two parts, 30 and 689956, that added together give a palindrome (689986).

The spelling of 30689956 in words is "thirty million, six hundred eighty-nine thousand, nine hundred fifty-six".