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BaseRepresentation
bin111011101011011000
3110102022100
4323223120
530310230
65123400
72035440
oct735330
9412270
10244440
11157719
12b9560
1387351
1465120
154c660

244440 has 96 divisors (see below), whose sum is σ = 917280. Its totient is φ = 55296.

The previous prime is 244429. The next prime is 244451. The reversal of 244440 is 44442.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (244429) and next prime (244451).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 244440.

It is an unprimeable number.

244440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2472 + ... + 2568.

It is an arithmetic number, because the mean of its divisors is an integer number (9555).

2244440 is an apocalyptic number.

244440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 244440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458640).

244440 is an abundant number, since it is smaller than the sum of its proper divisors (672840).

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

244440 is a wasteful number, since it uses less digits than its factorization.

244440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 244440 is about 494.4087377869. The cubic root of 244440 is about 62.5255362317.

Adding to 244440 its reverse (44442), we get a palindrome (288882).

The spelling of 244440 in words is "two hundred forty-four thousand, four hundred forty", and thus it is an iban number.