243857987438 has 8 divisors (see below), whose sum is σ = 393924441288. Its totient is φ = 112549840344.

The previous prime is 243857987437. The next prime is 243857987467. The reversal of 243857987438 is 834789758342.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243857987437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4689576656 + ... + 4689576707.

It is an arithmetic number, because the mean of its divisors is an integer number (49240555161).

Almost surely, 2^243857987438 is an apocalyptic number.

243857987438 is a deficient number, since it is larger than the sum of its proper divisors (150066453850).

243857987438 is a wasteful number, since it uses less digits than its factorization.

243857987438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9379153378.

The product of its digits is 325140480, while the sum is 68.

The spelling of 243857987438 in words is "two hundred forty-three billion, eight hundred fifty-seven million, nine hundred eighty-seven thousand, four hundred thirty-eight".