30644081 has 8 divisors (see below), whose sum is σ = 34942824. Its totient is φ = 26622720.

The previous prime is 30644077. The next prime is 30644083. The reversal of 30644081 is 18044603.

It can be written as a sum of positive squares in 4 ways, for example, as 9859600 + 20784481 = 3140^2 + 4559^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 30644081 - 2² = 30644077 is a prime.

It is a super-2 number, since 2×30644081² = 1878119400669122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30644081.

It is not an unprimeable number, because it can be changed into a prime (30644083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69110 + ... + 69551.

It is an arithmetic number, because the mean of its divisors is an integer number (4367853).

Almost surely, 2^30644081 is an apocalyptic number.

It is an amenable number.

30644081 is a deficient number, since it is larger than the sum of its proper divisors (4298743).

30644081 is a wasteful number, since it uses less digits than its factorization.

30644081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138691.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 30644081 is about 5535.7096202745. The cubic root of 30644081 is about 312.9312012160.

Adding to 30644081 its reverse (18044603), we get a palindrome (48688684).

The spelling of 30644081 in words is "thirty million, six hundred forty-four thousand, eighty-one".