243620402 has 8 divisors (see below), whose sum is σ = 365551212. Its totient is φ = 121770000.

The previous prime is 243620371. The next prime is 243620407. The reversal of 243620402 is 204026342.

It can be written as a sum of positive squares in 2 ways, for example, as 191794801 + 51825601 = 13849^2 + 7199^2 .

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

It is not an unprimeable number, because it can be changed into a prime (243620407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11849 + ... + 25052.

Almost surely, 2^243620402 is an apocalyptic number.

243620402 is a deficient number, since it is larger than the sum of its proper divisors (121930810).

243620402 is a wasteful number, since it uses less digits than its factorization.

243620402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40204.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243620402 is about 15608.3439864708. The cubic root of 243620402 is about 624.5557606904. Note that the first 3 decimals are identical.

Adding to 243620402 its reverse (204026342), we get a palindrome (447646744).

The spelling of 243620402 in words is "two hundred forty-three million, six hundred twenty thousand, four hundred two".