30396520 has 128 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 9273600.

The previous prime is 30396511. The next prime is 30396521. The reversal of 30396520 is 2569303.

It is a super-2 number, since 2×30396520² = 1847896856220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30396521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218611 + ... + 218749.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^30396520 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 30396520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43545600).

30396520 is an abundant number, since it is smaller than the sum of its proper divisors (56694680).

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

30396520 is a wasteful number, since it uses less digits than its factorization.

30396520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 30396520 is about 5513.3039096353. The cubic root of 30396520 is about 312.0862406788.

It can be divided in two parts, 3039 and 6520, that added together give a palindrome (9559).

The spelling of 30396520 in words is "thirty million, three hundred ninety-six thousand, five hundred twenty".