30830520 has 192 divisors, whose sum is σ = 113172480. Its totient is φ = 6580224.

The previous prime is 30830497. The next prime is 30830539. The reversal of 30830520 is 2503803.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242697 + ... + 242823.

It is an arithmetic number, because the mean of its divisors is an integer number (589440).

Almost surely, 2^30830520 is an apocalyptic number.

30830520 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 30830520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56586240).

30830520 is an abundant number, since it is smaller than the sum of its proper divisors (82341960).

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

30830520 is a wasteful number, since it uses less digits than its factorization.

30830520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 30830520 is about 5552.5237505120. The cubic root of 30830520 is about 313.5645444002.

The spelling of 30830520 in words is "thirty million, eight hundred thirty thousand, five hundred twenty".