30440236 has 12 divisors (see below), whose sum is σ = 53378640. Its totient is φ = 15189200.

The previous prime is 30440213. The next prime is 30440239. The reversal of 30440236 is 63204403.

It is not an unprimeable number, because it can be changed into a prime (30440239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5440 + ... + 9511.

It is an arithmetic number, because the mean of its divisors is an integer number (4448220).

Almost surely, 2^30440236 is an apocalyptic number.

It is an amenable number.

30440236 is a deficient number, since it is larger than the sum of its proper divisors (22938404).

30440236 is a wasteful number, since it uses less digits than its factorization.

30440236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15464 (or 15462 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 30440236 is about 5517.2670770953. The cubic root of 30440236 is about 312.2357822143.

Adding to 30440236 its reverse (63204403), we get a palindrome (93644639).

The spelling of 30440236 in words is "thirty million, four hundred forty thousand, two hundred thirty-six".