30561642 has 12 divisors (see below), whose sum is σ = 66216930. Its totient is φ = 10187208.

The previous prime is 30561623. The next prime is 30561677. The reversal of 30561642 is 24616503.

30561642 is a `hidden beast` number, since 3 + 0 + 5 + 616 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29713401 + 848241 = 5451^2 + 921^2 .

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 5 ways as a sum of consecutive naturals, for example, 848917 + ... + 848952.

Almost surely, 2^30561642 is an apocalyptic number.

30561642 is an abundant number, since it is smaller than the sum of its proper divisors (35655288).

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

30561642 is a wasteful number, since it uses less digits than its factorization.

30561642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697877 (or 1697874 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30561642 is about 5528.2584961270. The cubic root of 30561642 is about 312.6503323623.

The spelling of 30561642 in words is "thirty million, five hundred sixty-one thousand, six hundred forty-two".