30308440 has 16 divisors (see below), whose sum is σ = 68194080. Its totient is φ = 12123360.

The previous prime is 30308419. The next prime is 30308441. The reversal of 30308440 is 4480303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30308441) 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, 378816 + ... + 378895.

It is an arithmetic number, because the mean of its divisors is an integer number (4262130).

Almost surely, 2^30308440 is an apocalyptic number.

It is an amenable number.

30308440 is an abundant number, since it is smaller than the sum of its proper divisors (37885640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30308440 is a wasteful number, since it uses less digits than its factorization.

30308440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757722 (or 757718 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 30308440 is about 5505.3101638327. The cubic root of 30308440 is about 311.7845049307.

Adding to 30308440 its reverse (4480303), we get a palindrome (34788743).

The spelling of 30308440 in words is "thirty million, three hundred eight thousand, four hundred forty".