30961642 has 8 divisors (see below), whose sum is σ = 47575332. Its totient is φ = 15103200.

The previous prime is 30961613. The next prime is 30961643. The reversal of 30961642 is 24616903.

It can be written as a sum of positive squares in 2 ways, for example, as 18913801 + 12047841 = 4349^2 + 3471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (30961643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188709 + ... + 188872.

Almost surely, 2^30961642 is an apocalyptic number.

30961642 is a deficient number, since it is larger than the sum of its proper divisors (16613690).

30961642 is a wasteful number, since it uses less digits than its factorization.

30961642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377624.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30961642 is about 5564.3186465191. The cubic root of 30961642 is about 314.0084450107.

The spelling of 30961642 in words is "thirty million, nine hundred sixty-one thousand, six hundred forty-two".