249440 has 24 divisors (see below), whose sum is σ = 589680. Its totient is φ = 99712.

The previous prime is 249439. The next prime is 249449. The reversal of 249440 is 44942.

It is a happy number.

249440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a zygodrome in base 2.

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 249440.

It is not an unprimeable number, because it can be changed into a prime (249449) 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, 620 + ... + 939.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2²⁴⁹⁴⁴⁰ is an apocalyptic number.

249440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249440 is an abundant number, since it is smaller than the sum of its proper divisors (340240).

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

249440 is a wasteful number, since it uses less digits than its factorization.

249440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 249440 is about 499.4396860483. The cubic root of 249440 is about 62.9489802774.

The spelling of 249440 in words is "two hundred forty-nine thousand, four hundred forty".