243361986 has 32 divisors (see below), whose sum is σ = 556771968. Its totient is φ = 69467520.

The previous prime is 243361981. The next prime is 243362003. The reversal of 243361986 is 689163342.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (243361981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60766 + ... + 64646.

It is an arithmetic number, because the mean of its divisors is an integer number (17399124).

Almost surely, 2^243361986 is an apocalyptic number.

243361986 is an abundant number, since it is smaller than the sum of its proper divisors (313409982).

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

243361986 is a wasteful number, since it uses less digits than its factorization.

243361986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386.

The product of its digits is 186624, while the sum is 42.

The square root of 243361986 is about 15600.0636537163. The cubic root of 243361986 is about 624.3348537666.

The spelling of 243361986 in words is "two hundred forty-three million, three hundred sixty-one thousand, nine hundred eighty-six".