243768650 has 24 divisors (see below), whose sum is σ = 455777004. Its totient is φ = 96998400.

The previous prime is 243768647. The next prime is 243768653. The reversal of 243768650 is 56867342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243768647) and next prime (243768653).

It can be written as a sum of positive squares in 6 ways, for example, as 21132409 + 222636241 = 4597^2 + 14921^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 243768598 and 243768607.

It is not an unprimeable number, because it can be changed into a prime (243768653) 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, 2981 + ... + 22280.

Almost surely, 2^243768650 is an apocalyptic number.

243768650 is a deficient number, since it is larger than the sum of its proper divisors (212008354).

243768650 is a wasteful number, since it uses less digits than its factorization.

243768650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25466 (or 25461 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 243768650 is about 15613.0922625853. The cubic root of 243768650 is about 624.6824199894.

The spelling of 243768650 in words is "two hundred forty-three million, seven hundred sixty-eight thousand, six hundred fifty".