30120424 has 16 divisors (see below), whose sum is σ = 56635200. Its totient is φ = 15017712.

The previous prime is 30120383. The next prime is 30120427. The reversal of 30120424 is 42402103.

It is a junction number, because it is equal to n+sod(n) for n = 30120398 and 30120407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2194 + ... + 8065.

It is an arithmetic number, because the mean of its divisors is an integer number (3539700).

Almost surely, 2^30120424 is an apocalyptic number.

It is an amenable number.

30120424 is a deficient number, since it is larger than the sum of its proper divisors (26514776).

30120424 is a wasteful number, since it uses less digits than its factorization.

30120424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632 (or 10628 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 30120424 is about 5488.2077220164. The cubic root of 30120424 is about 311.1384570445.

Adding to 30120424 its reverse (42402103), we get a palindrome (72522527).

The spelling of 30120424 in words is "thirty million, one hundred twenty thousand, four hundred twenty-four".