30520368 has 160 divisors (see below), whose sum is σ = 94279680. Its totient is φ = 9434880.

The previous prime is 30520367. The next prime is 30520381. The reversal of 30520368 is 86302503.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30520367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 575830 + ... + 575882.

It is an arithmetic number, because the mean of its divisors is an integer number (589248).

Almost surely, 2^30520368 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 30520368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47139840).

30520368 is an abundant number, since it is smaller than the sum of its proper divisors (63759312).

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

30520368 is a wasteful number, since it uses less digits than its factorization.

30520368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30520368 is about 5524.5242329091. The cubic root of 30520368 is about 312.5095224832.

The spelling of 30520368 in words is "thirty million, five hundred twenty thousand, three hundred sixty-eight".