30681970 has 24 divisors (see below), whose sum is σ = 60707052. Its totient is φ = 11156640.

The previous prime is 30681961. The next prime is 30681983. The reversal of 30681970 is 7918603.

It can be written as a sum of positive squares in 2 ways, for example, as 29888089 + 793881 = 5467^2 + 891^2 .

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 11 ways as a sum of consecutive naturals, for example, 11469 + ... + 13888.

Almost surely, 2^30681970 is an apocalyptic number.

30681970 is a deficient number, since it is larger than the sum of its proper divisors (30025082).

30681970 is a wasteful number, since it uses less digits than its factorization.

30681970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25386 (or 25375 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 30681970 is about 5539.1307982390. The cubic root of 30681970 is about 313.0601197177.

The spelling of 30681970 in words is "thirty million, six hundred eighty-one thousand, nine hundred seventy".