249878 has 8 divisors (see below), whose sum is σ = 378768. Its totient is φ = 123624.

The previous prime is 249871. The next prime is 249881. The reversal of 249878 is 878942.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249878.

It is not an unprimeable number, because it can be changed into a prime (249871) 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, 401 + ... + 812.

It is an arithmetic number, because the mean of its divisors is an integer number (47346).

2²⁴⁹⁸⁷⁸ is an apocalyptic number.

249878 is a deficient number, since it is larger than the sum of its proper divisors (128890).

249878 is a wasteful number, since it uses less digits than its factorization.

249878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318.

The product of its digits is 32256, while the sum is 38.

The square root of 249878 is about 499.8779851124. The cubic root of 249878 is about 62.9858034695.

The spelling of 249878 in words is "two hundred forty-nine thousand, eight hundred seventy-eight".