30238420 has 12 divisors (see below), whose sum is σ = 63500724. Its totient is φ = 12095360.

The previous prime is 30238409. The next prime is 30238421. The reversal of 30238420 is 2483203.

It can be written as a sum of positive squares in 2 ways, for example, as 6091024 + 24147396 = 2468^2 + 4914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30238391 and 30238400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30238421) 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, 755941 + ... + 755980.

It is an arithmetic number, because the mean of its divisors is an integer number (5291727).

Almost surely, 2^30238420 is an apocalyptic number.

It is an amenable number.

30238420 is an abundant number, since it is smaller than the sum of its proper divisors (33262304).

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

30238420 is a wasteful number, since it uses less digits than its factorization.

30238420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511930 (or 1511928 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 30238420 is about 5498.9471719594. The cubic root of 30238420 is about 311.5442199976.

The spelling of 30238420 in words is "thirty million, two hundred thirty-eight thousand, four hundred twenty".