30669891 has 16 divisors (see below), whose sum is σ = 46848000. Its totient is φ = 17483328.

The previous prime is 30669871. The next prime is 30669893. The reversal of 30669891 is 19896603.

It is not a de Polignac number, because 30669891 - 2⁶ = 30669827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30669893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8535 + ... + 11583.

It is an arithmetic number, because the mean of its divisors is an integer number (2928000).

Almost surely, 2^30669891 is an apocalyptic number.

30669891 is a deficient number, since it is larger than the sum of its proper divisors (16178109).

30669891 is a wasteful number, since it uses less digits than its factorization.

30669891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 30669891 is about 5538.0403573827. The cubic root of 30669891 is about 313.0190320743.

The spelling of 30669891 in words is "thirty million, six hundred sixty-nine thousand, eight hundred ninety-one".