30238740 has 144 divisors (see below), whose sum is σ = 106299648. Its totient is φ = 6815232.

The previous prime is 30238727. The next prime is 30238783. The reversal of 30238740 is 4783203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129664 + ... + 129896.

It is an arithmetic number, because the mean of its divisors is an integer number (738192).

Almost surely, 2^30238740 is an apocalyptic number.

30238740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30238740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53149824).

30238740 is an abundant number, since it is smaller than the sum of its proper divisors (76060908).

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

30238740 is a wasteful number, since it uses less digits than its factorization.

30238740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 30238740 is about 5498.9762683612. The cubic root of 30238740 is about 311.5453189725.

The spelling of 30238740 in words is "thirty million, two hundred thirty-eight thousand, seven hundred forty".