30698920 has 32 divisors (see below), whose sum is σ = 78940800. Its totient is φ = 10525248.

The previous prime is 30698903. The next prime is 30698953. The reversal of 30698920 is 2989603.

It is a self number, because there is not a number n which added to its sum of digits gives 30698920.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 54540 + ... + 55099.

It is an arithmetic number, because the mean of its divisors is an integer number (2466900).

Almost surely, 2^30698920 is an apocalyptic number.

It is an amenable number.

30698920 is an abundant number, since it is smaller than the sum of its proper divisors (48241880).

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

30698920 is a wasteful number, since it uses less digits than its factorization.

30698920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109657 (or 109653 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 30698920 is about 5540.6606104327. The cubic root of 30698920 is about 313.1177582611.

The spelling of 30698920 in words is "thirty million, six hundred ninety-eight thousand, nine hundred twenty".