239782280018 has 18 divisors (see below), whose sum is σ = 361860703407. Its totient is φ = 119166432480.

The previous prime is 239782279987. The next prime is 239782280021. The reversal of 239782280018 is 810082287932.

It can be written as a sum of positive squares in 5 ways, for example, as 59754335809 + 180027944209 = 244447^2 + 424297^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=346253.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 125342630 + ... + 125344542.

Almost surely, 2^239782280018 is an apocalyptic number.

239782280018 is a deficient number, since it is larger than the sum of its proper divisors (122078423389).

239782280018 is an frugal number, since it uses more digits than its factorization.

239782280018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

Multiplying 239782280018 by its sum of digits (50), we get a square (11989114000900 = 3462530²).

The spelling of 239782280018 in words is "two hundred thirty-nine billion, seven hundred eighty-two million, two hundred eighty thousand, eighteen".