30807868 has 72 divisors (see below), whose sum is σ = 68774832. Its totient is φ = 11966976.

The previous prime is 30807863. The next prime is 30807871. The reversal of 30807868 is 86870803.

It is a self number, because there is not a number n which added to its sum of digits gives 30807868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30807863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272580 + ... + 272692.

It is an arithmetic number, because the mean of its divisors is an integer number (955206).

Almost surely, 2^30807868 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 30807868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34387416).

30807868 is an abundant number, since it is smaller than the sum of its proper divisors (37966964).

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

30807868 is a wasteful number, since it uses less digits than its factorization.

30807868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 30807868 is about 5550.4835825358. The cubic root of 30807868 is about 313.4877308582.

The spelling of 30807868 in words is "thirty million, eight hundred seven thousand, eight hundred sixty-eight".