30313040 has 80 divisors (see below), whose sum is σ = 77137920. Its totient is φ = 11028480.

The previous prime is 30313039. The next prime is 30313043. The reversal of 30313040 is 4031303.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30313043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41801 + ... + 42519.

It is an arithmetic number, because the mean of its divisors is an integer number (964224).

Almost surely, 2^30313040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30313040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38568960).

30313040 is an abundant number, since it is smaller than the sum of its proper divisors (46824880).

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

30313040 is a wasteful number, since it uses less digits than its factorization.

30313040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 30313040 is about 5505.7279264417. The cubic root of 30313040 is about 311.8002776128.

Adding to 30313040 its reverse (4031303), we get a palindrome (34344343).

The spelling of 30313040 in words is "thirty million, three hundred thirteen thousand, forty".