30338742 has 48 divisors (see below), whose sum is σ = 72517680. Its totient is φ = 8430912.

The previous prime is 30338717. The next prime is 30338743. The reversal of 30338742 is 24783303.

It is a super-2 number, since 2×30338742² = 1840878532285128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30338743) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9484 + ... + 12272.

It is an arithmetic number, because the mean of its divisors is an integer number (1510785).

Almost surely, 2^30338742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30338742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36258840).

30338742 is an abundant number, since it is smaller than the sum of its proper divisors (42178938).

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

30338742 is a wasteful number, since it uses less digits than its factorization.

30338742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845 (or 2838 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 30338742 is about 5508.0615464971. The cubic root of 30338742 is about 311.8883764074. Note that the first 3 decimals are identical.

The spelling of 30338742 in words is "thirty million, three hundred thirty-eight thousand, seven hundred forty-two".