249878668 has 36 divisors (see below), whose sum is σ = 475261248. Its totient is φ = 114903360.

The previous prime is 249878663. The next prime is 249878677. The reversal of 249878668 is 866878942.

249878668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (249878663) 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, 251653 + ... + 252643.

Almost surely, 2^249878668 is an apocalyptic number.

It is an amenable number.

249878668 is a deficient number, since it is larger than the sum of its proper divisors (225382580).

249878668 is a wasteful number, since it uses less digits than its factorization.

249878668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1379 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The square root of 249878668 is about 15807.5509804650. The cubic root of 249878668 is about 629.8585959621.

The spelling of 249878668 in words is "two hundred forty-nine million, eight hundred seventy-eight thousand, six hundred sixty-eight".