250440 has 32 divisors (see below), whose sum is σ = 751680. Its totient is φ = 66752.

The previous prime is 250433. The next prime is 250441. The reversal of 250440 is 44052.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 250440.

It is not an unprimeable number, because it can be changed into a prime (250441) by changing a digit.

250440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (23490).

2²⁵⁰⁴⁴⁰ is an apocalyptic number.

250440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

250440 is an abundant number, since it is smaller than the sum of its proper divisors (501240).

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

250440 is a wasteful number, since it uses less digits than its factorization.

250440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 250440 is about 500.4398065702. The cubic root of 250440 is about 63.0329885182.

Adding to 250440 its reverse (44052), we get a palindrome (294492).

The spelling of 250440 in words is "two hundred fifty thousand, four hundred forty".