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1440244 = 221327697
BaseRepresentation
bin101011111100111110100
32201011122101
411133213310
5332041434
650511444
715145651
oct5374764
92634571
101440244
118a4093
12595584
133b5720
14296c28
151d6b14
hex15f9f4

1440244 has 12 divisors (see below), whose sum is σ = 2714404. Its totient is φ = 664704.

The previous prime is 1440239. The next prime is 1440247. The reversal of 1440244 is 4420441.

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 1350244 = 300^2 + 1162^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440247) 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, 13797 + ... + 13900.

21440244 is an apocalyptic number.

It is an amenable number.

1440244 is a deficient number, since it is larger than the sum of its proper divisors (1274160).

1440244 is a wasteful number, since it uses less digits than its factorization.

1440244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27714 (or 27712 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1440244 is about 1200.1016623603. The cubic root of 1440244 is about 112.9307012386.

Adding to 1440244 its reverse (4420441), we get a palindrome (5860685).

The spelling of 1440244 in words is "one million, four hundred forty thousand, two hundred forty-four".

Divisors: 1 2 4 13 26 52 27697 55394 110788 360061 720122 1440244