239745978 has 12 divisors (see below), whose sum is σ = 519449658. Its totient is φ = 79915320.

The previous prime is 239745973. The next prime is 239745991. The reversal of 239745978 is 879547932.

It can be written as a sum of positive squares in only one way, i.e., 235837449 + 3908529 = 15357^2 + 1977^2 .

It is not an unprimeable number, because it can be changed into a prime (239745973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6659593 + ... + 6659628.

Almost surely, 2^239745978 is an apocalyptic number.

239745978 is an abundant number, since it is smaller than the sum of its proper divisors (279703680).

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

239745978 is a wasteful number, since it uses less digits than its factorization.

239745978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13319229 (or 13319226 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 239745978 is about 15483.7326895035. The cubic root of 239745978 is about 621.2271722872.

The spelling of 239745978 in words is "two hundred thirty-nine million, seven hundred forty-five thousand, nine hundred seventy-eight".