30681910 has 16 divisors (see below), whose sum is σ = 63117216. Its totient is φ = 10519488.

The previous prime is 30681907. The next prime is 30681961. The reversal of 30681910 is 1918603.

It is a happy number.

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, 219087 + ... + 219226.

It is an arithmetic number, because the mean of its divisors is an integer number (3944826).

Almost surely, 2^30681910 is an apocalyptic number.

30681910 is an abundant number, since it is smaller than the sum of its proper divisors (32435306).

30681910 is a wasteful number, since it uses less digits than its factorization.

30681910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438327.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 30681910 is about 5539.1253822242. The cubic root of 30681910 is about 313.0599156498.

The spelling of 30681910 in words is "thirty million, six hundred eighty-one thousand, nine hundred ten".