30328320 has 160 divisors (see below), whose sum is σ = 106064640. Its totient is φ = 7331840.

The previous prime is 30328307. The next prime is 30328321. The reversal of 30328320 is 2382303.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30328321) 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, 84301 + ... + 84659.

It is an arithmetic number, because the mean of its divisors is an integer number (662904).

Almost surely, 2^30328320 is an apocalyptic number.

30328320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30328320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53032320).

30328320 is an abundant number, since it is smaller than the sum of its proper divisors (75736320).

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

30328320 is a wasteful number, since it uses less digits than its factorization.

30328320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 30328320 is about 5507.1153973746. The cubic root of 30328320 is about 311.8526588977.

It can be divided in two parts, 303283 and 20, that added together give a palindrome (303303).

The spelling of 30328320 in words is "thirty million, three hundred twenty-eight thousand, three hundred twenty".