30124420 has 24 divisors (see below), whose sum is σ = 63365400. Its totient is φ = 12029952.

The previous prime is 30124403. The next prime is 30124427. The reversal of 30124420 is 2442103.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 30096196 = 168^2 + 5486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30124394 and 30124403.

It is not an unprimeable number, because it can be changed into a prime (30124427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20676 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (2640225).

Almost surely, 2^30124420 is an apocalyptic number.

It is an amenable number.

30124420 is an abundant number, since it is smaller than the sum of its proper divisors (33240980).

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

30124420 is a wasteful number, since it uses less digits than its factorization.

30124420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487 (or 2485 counting only the distinct ones).

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

The square root of 30124420 is about 5488.5717632186. The cubic root of 30124420 is about 311.1522157518.

Adding to 30124420 its reverse (2442103), we get a palindrome (32566523).

The spelling of 30124420 in words is "thirty million, one hundred twenty-four thousand, four hundred twenty".