243006140 has 24 divisors (see below), whose sum is σ = 549568320. Its totient is φ = 89725248.

The previous prime is 243006089. The next prime is 243006151. The reversal of 243006140 is 41600342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467060 + ... + 467579.

It is an arithmetic number, because the mean of its divisors is an integer number (22898680).

Almost surely, 2^243006140 is an apocalyptic number.

243006140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243006140 is an abundant number, since it is smaller than the sum of its proper divisors (306562180).

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

243006140 is a wasteful number, since it uses less digits than its factorization.

243006140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934661 (or 934659 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 243006140 is about 15588.6542074677. The cubic root of 243006140 is about 624.0304027210.

Adding to 243006140 its reverse (41600342), we get a palindrome (284606482).

The spelling of 243006140 in words is "two hundred forty-three million, six thousand, one hundred forty".