30669881 has 16 divisors (see below), whose sum is σ = 35209728. Its totient is φ = 26457600.

The previous prime is 30669871. The next prime is 30669893. The reversal of 30669881 is 18896603.

It is a happy number.

It is not a de Polignac number, because 30669881 - 2²² = 26475577 is a prime.

It is a super-2 number, since 2×30669881² = 1881283201108322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30669811) 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, 17225 + ... + 18921.

It is an arithmetic number, because the mean of its divisors is an integer number (2200608).

Almost surely, 2^30669881 is an apocalyptic number.

30669881 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30669881 is a deficient number, since it is larger than the sum of its proper divisors (4539847).

30669881 is a wasteful number, since it uses less digits than its factorization.

30669881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 30669881 is about 5538.0394545362. The cubic root of 30669881 is about 313.0189980541.

The spelling of 30669881 in words is "thirty million, six hundred sixty-nine thousand, eight hundred eighty-one".