30807056 has 80 divisors (see below), whose sum is σ = 74280960. Its totient is φ = 12078720.

The previous prime is 30807001. The next prime is 30807059. The reversal of 30807056 is 65070803.

It is not an unprimeable number, because it can be changed into a prime (30807059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65735 + ... + 66201.

It is an arithmetic number, because the mean of its divisors is an integer number (928512).

Almost surely, 2^30807056 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 30807056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37140480).

30807056 is an abundant number, since it is smaller than the sum of its proper divisors (43473904).

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

30807056 is a wasteful number, since it uses less digits than its factorization.

30807056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 30807056 is about 5550.4104352741. The cubic root of 30807056 is about 313.4849766454.

Adding to 30807056 its reverse (65070803), we get a palindrome (95877859).

The spelling of 30807056 in words is "thirty million, eight hundred seven thousand, fifty-six".