30840165 has 12 divisors (see below), whose sum is σ = 53456364. Its totient is φ = 16448064.

The previous prime is 30840163. The next prime is 30840221. The reversal of 30840165 is 56104803.

It can be written as a sum of positive squares in 2 ways, for example, as 10751841 + 20088324 = 3279^2 + 4482^2 .

It is not a de Polignac number, because 30840165 - 2¹ = 30840163 is a prime.

It is a super-2 number, since 2×30840165² = 1902231554454450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30840163) 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, 342624 + ... + 342713.

It is an arithmetic number, because the mean of its divisors is an integer number (4454697).

Almost surely, 2^30840165 is an apocalyptic number.

It is an amenable number.

30840165 is a deficient number, since it is larger than the sum of its proper divisors (22616199).

30840165 is a wasteful number, since it uses less digits than its factorization.

30840165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685348 (or 685345 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 30840165 is about 5553.3922065707. The cubic root of 30840165 is about 313.5972394343.

Adding to 30840165 its reverse (56104803), we get a palindrome (86944968).

The spelling of 30840165 in words is "thirty million, eight hundred forty thousand, one hundred sixty-five".