30605380 has 48 divisors (see below), whose sum is σ = 70552944. Its totient is φ = 11082240.

The previous prime is 30605363. The next prime is 30605381. The reversal of 30605380 is 8350603.

It can be written as a sum of positive squares in 8 ways, for example, as 112896 + 30492484 = 336^2 + 5522^2 .

It is not an unprimeable number, because it can be changed into a prime (30605381) 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, 12670 + ... + 14890.

It is an arithmetic number, because the mean of its divisors is an integer number (1469853).

Almost surely, 2^30605380 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 30605380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35276472).

30605380 is an abundant number, since it is smaller than the sum of its proper divisors (39947564).

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

30605380 is a wasteful number, since it uses less digits than its factorization.

30605380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30605380 is about 5532.2129387796. The cubic root of 30605380 is about 312.7994101065.

Adding to 30605380 its reverse (8350603), we get a palindrome (38955983).

The spelling of 30605380 in words is "thirty million, six hundred five thousand, three hundred eighty".