30689320 has 32 divisors (see below), whose sum is σ = 70738920. Its totient is φ = 11975680.

The previous prime is 30689311. The next prime is 30689339. The reversal of 30689320 is 2398603.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21215236 + 9474084 = 4606^2 + 3078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7717 + ... + 10996.

Almost surely, 2^30689320 is an apocalyptic number.

It is an amenable number.

30689320 is an abundant number, since it is smaller than the sum of its proper divisors (40049600).

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

30689320 is a wasteful number, since it uses less digits than its factorization.

30689320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18765 (or 18761 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30689320 is about 5539.7942200049. The cubic root of 30689320 is about 313.0851160285.

The spelling of 30689320 in words is "thirty million, six hundred eighty-nine thousand, three hundred twenty".