30961660 has 12 divisors (see below), whose sum is σ = 65019528. Its totient is φ = 12384656.

The previous prime is 30961643. The next prime is 30961663. The reversal of 30961660 is 6616903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30961663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774022 + ... + 774061.

It is an arithmetic number, because the mean of its divisors is an integer number (5418294).

Almost surely, 2^30961660 is an apocalyptic number.

It is an amenable number.

30961660 is an abundant number, since it is smaller than the sum of its proper divisors (34057868).

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

30961660 is a wasteful number, since it uses less digits than its factorization.

30961660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548092 (or 1548090 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 30961660 is about 5564.3202639676. The cubic root of 30961660 is about 314.0085058618.

The spelling of 30961660 in words is "thirty million, nine hundred sixty-one thousand, six hundred sixty".