30784768 has 72 divisors (see below), whose sum is σ = 72112320. Its totient is φ = 12840960.

The previous prime is 30784763. The next prime is 30784771. The reversal of 30784768 is 86748703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30784763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73263 + ... + 73681.

It is an arithmetic number, because the mean of its divisors is an integer number (1001560).

Almost surely, 2^30784768 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 30784768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36056160).

30784768 is an abundant number, since it is smaller than the sum of its proper divisors (41327552).

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

30784768 is an equidigital number, since it uses as much as digits as its factorization.

30784768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 30784768 is about 5548.4022925523. The cubic root of 30784768 is about 313.4093593497.

The spelling of 30784768 in words is "thirty million, seven hundred eighty-four thousand, seven hundred sixty-eight".