30561380 has 24 divisors (see below), whose sum is σ = 65139648. Its totient is φ = 12041568.

The previous prime is 30561379. The next prime is 30561397. The reversal of 30561380 is 8316503.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10064 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (2714152).

Almost surely, 2^30561380 is an apocalyptic number.

It is an amenable number.

30561380 is an abundant number, since it is smaller than the sum of its proper divisors (34578268).

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

30561380 is a wasteful number, since it uses less digits than its factorization.

30561380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22883 (or 22881 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 30561380 is about 5528.2347996445. The cubic root of 30561380 is about 312.6494389262.

Adding to 30561380 its reverse (8316503), we get a palindrome (38877883).

The spelling of 30561380 in words is "thirty million, five hundred sixty-one thousand, three hundred eighty".