30120894 has 24 divisors (see below), whose sum is σ = 65364312. Its totient is φ = 10024560.

The previous prime is 30120887. The next prime is 30120917. The reversal of 30120894 is 49802103.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 18909 + ... + 20439.

It is an arithmetic number, because the mean of its divisors is an integer number (2723513).

Almost surely, 2^30120894 is an apocalyptic number.

30120894 is an abundant number, since it is smaller than the sum of its proper divisors (35243418).

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

30120894 is a wasteful number, since it uses less digits than its factorization.

30120894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 30120894 is about 5488.2505409283. The cubic root of 30120894 is about 311.1400753740.

Adding to 30120894 its reverse (49802103), we get a palindrome (79922997).

The spelling of 30120894 in words is "thirty million, one hundred twenty thousand, eight hundred ninety-four".