30243140 has 24 divisors (see below), whose sum is σ = 64097880. Its totient is φ = 11985408.

The previous prime is 30243127. The next prime is 30243151. The reversal of 30243140 is 4134203.

It can be written as a sum of positive squares in 4 ways, for example, as 4700224 + 25542916 = 2168^2 + 5054^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4757 + ... + 9116.

It is an arithmetic number, because the mean of its divisors is an integer number (2670745).

Almost surely, 2^30243140 is an apocalyptic number.

It is an amenable number.

30243140 is an abundant number, since it is smaller than the sum of its proper divisors (33854740).

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

30243140 is a wasteful number, since it uses less digits than its factorization.

30243140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13991 (or 13989 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30243140 is about 5499.3763282758. The cubic root of 30243140 is about 311.5604290920.

Adding to 30243140 its reverse (4134203), we get a palindrome (34377343).

The spelling of 30243140 in words is "thirty million, two hundred forty-three thousand, one hundred forty".