239878690 has 8 divisors (see below), whose sum is σ = 431781660. Its totient is φ = 95951472.

The previous prime is 239878673. The next prime is 239878697. The reversal of 239878690 is 96878932.

239878690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 232044289 + 7834401 = 15233^2 + 2799^2 .

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

It is a super-2 number, since 2×239878690² = 115083571832232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (239878697) 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, 11993925 + ... + 11993944.

Almost surely, 2^239878690 is an apocalyptic number.

239878690 is a deficient number, since it is larger than the sum of its proper divisors (191902970).

239878690 is a wasteful number, since it uses less digits than its factorization.

239878690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23987876.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 239878690 is about 15488.0176265396. The cubic root of 239878690 is about 621.3417784402.

The spelling of 239878690 in words is "two hundred thirty-nine million, eight hundred seventy-eight thousand, six hundred ninety".