30669642 has 24 divisors (see below), whose sum is σ = 66941316. Its totient is φ = 10147776.

The previous prime is 30669637. The next prime is 30669643. The reversal of 30669642 is 24696603.

30669642 is a `hidden beast` number, since 3 + 0 + 6 + 6 + 9 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28740321 + 1929321 = 5361^2 + 1389^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30669597 and 30669606.

It is not an unprimeable number, because it can be changed into a prime (30669643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3753 + ... + 8684.

Almost surely, 2^30669642 is an apocalyptic number.

30669642 is an abundant number, since it is smaller than the sum of its proper divisors (36271674).

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

30669642 is a wasteful number, since it uses less digits than its factorization.

30669642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12582 (or 12579 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 30669642 is about 5538.0178764609. The cubic root of 30669642 is about 313.0181849683.

The spelling of 30669642 in words is "thirty million, six hundred sixty-nine thousand, six hundred forty-two".