30203442 has 48 divisors (see below), whose sum is σ = 70237440. Its totient is φ = 9716112.

The previous prime is 30203417. The next prime is 30203447. The reversal of 30203442 is 24430203.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30203447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13023 + ... + 15165.

It is an arithmetic number, because the mean of its divisors is an integer number (1463280).

Almost surely, 2^30203442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30203442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35118720).

30203442 is an abundant number, since it is smaller than the sum of its proper divisors (40033998).

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

30203442 is a wasteful number, since it uses less digits than its factorization.

30203442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189 (or 2177 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 30203442 is about 5495.7658247054. The cubic root of 30203442 is about 311.4240483950.

Adding to 30203442 its reverse (24430203), we get a palindrome (54633645).

The spelling of 30203442 in words is "thirty million, two hundred three thousand, four hundred forty-two".