243128686 has 8 divisors (see below), whose sum is σ = 364759200. Its totient is φ = 121542288.

The previous prime is 243128623. The next prime is 243128749. The reversal of 243128686 is 686821342.

It is an interprime number because it is at equal distance from previous prime (243128623) and next prime (243128749).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×243128686² = 118223115912173192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15970 + ... + 27226.

It is an arithmetic number, because the mean of its divisors is an integer number (45594900).

Almost surely, 2^243128686 is an apocalyptic number.

243128686 is a deficient number, since it is larger than the sum of its proper divisors (121630514).

243128686 is a wasteful number, since it uses less digits than its factorization.

243128686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22058.

The product of its digits is 110592, while the sum is 40.

The square root of 243128686 is about 15592.5843271730. The cubic root of 243128686 is about 624.1352828947.

The spelling of 243128686 in words is "two hundred forty-three million, one hundred twenty-eight thousand, six hundred eighty-six".