30721314 has 16 divisors (see below), whose sum is σ = 66169152. Its totient is φ = 9452688.

The previous prime is 30721277. The next prime is 30721333. The reversal of 30721314 is 41312703.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 196854 + ... + 197009.

It is an arithmetic number, because the mean of its divisors is an integer number (4135572).

Almost surely, 2^30721314 is an apocalyptic number.

30721314 is an abundant number, since it is smaller than the sum of its proper divisors (35447838).

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

30721314 is a wasteful number, since it uses less digits than its factorization.

30721314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393881.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 30721314 is about 5542.6811201800. The cubic root of 30721314 is about 313.1938766257.

The spelling of 30721314 in words is "thirty million, seven hundred twenty-one thousand, three hundred fourteen".