30243040 has 24 divisors (see below), whose sum is σ = 71449560. Its totient is φ = 12097152.

The previous prime is 30243029. The next prime is 30243047. The reversal of 30243040 is 4034203.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30243047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94350 + ... + 94669.

It is an arithmetic number, because the mean of its divisors is an integer number (2977065).

Almost surely, 2^30243040 is an apocalyptic number.

It is an amenable number.

30243040 is an abundant number, since it is smaller than the sum of its proper divisors (41206520).

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

30243040 is a wasteful number, since it uses less digits than its factorization.

30243040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189034 (or 189026 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 30243040 is about 5499.3672363282. The cubic root of 30243040 is about 311.5600856965.

Adding to 30243040 its reverse (4034203), we get a palindrome (34277243).

The spelling of 30243040 in words is "thirty million, two hundred forty-three thousand, forty".