243142886 has 24 divisors (see below), whose sum is σ = 439917840. Its totient is φ = 98717616.

The previous prime is 243142883. The next prime is 243142903. The reversal of 243142886 is 688241342.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243142883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19001 + ... + 29108.

It is an arithmetic number, because the mean of its divisors is an integer number (18329910).

Almost surely, 2^243142886 is an apocalyptic number.

243142886 is a deficient number, since it is larger than the sum of its proper divisors (196774954).

243142886 is a wasteful number, since it uses less digits than its factorization.

243142886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48156 (or 48137 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 243142886 is about 15593.0396651840. The cubic root of 243142886 is about 624.1474335910.

The spelling of 243142886 in words is "two hundred forty-three million, one hundred forty-two thousand, eight hundred eighty-six".