30342520 has 128 divisors (see below), whose sum is σ = 79833600. Its totient is φ = 10289664.

The previous prime is 30342517. The next prime is 30342539. The reversal of 30342520 is 2524303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514251 + ... + 514309.

It is an arithmetic number, because the mean of its divisors is an integer number (623700).

Almost surely, 2^30342520 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 30342520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39916800).

30342520 is an abundant number, since it is smaller than the sum of its proper divisors (49491080).

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

30342520 is a wasteful number, since it uses less digits than its factorization.

30342520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 30342520 is about 5508.4044876897. The cubic root of 30342520 is about 311.9013220702.

Adding to 30342520 its reverse (2524303), we get a palindrome (32866823).

The spelling of 30342520 in words is "thirty million, three hundred forty-two thousand, five hundred twenty".