239688890 has 24 divisors (see below), whose sum is σ = 501880212. Its totient is φ = 82178880.

The previous prime is 239688887. The next prime is 239688893. The reversal of 239688890 is 98886932.

It is an interprime number because it is at equal distance from previous prime (239688887) and next prime (239688893).

It can be written as a sum of positive squares in 2 ways, for example, as 215884249 + 23804641 = 14693^2 + 4879^2 .

It is not an unprimeable number, because it can be changed into a prime (239688893) 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, 244091 + ... + 245070.

Almost surely, 2^239688890 is an apocalyptic number.

239688890 is an abundant number, since it is smaller than the sum of its proper divisors (262191322).

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

239688890 is a wasteful number, since it uses less digits than its factorization.

239688890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489182 (or 489175 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 239688890 is about 15481.8890966187. The cubic root of 239688890 is about 621.1778597712.

The spelling of 239688890 in words is "two hundred thirty-nine million, six hundred eighty-eight thousand, eight hundred ninety".