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440442 = 23224469
BaseRepresentation
bin1101011100001111010
3211101011200
41223201322
5103043232
613235030
73513042
oct1534172
9741150
10440442
11280a02
12192a76
13125622
14b6722
158a77c
hex6b87a

440442 has 12 divisors (see below), whose sum is σ = 954330. Its totient is φ = 146808.

The previous prime is 440441. The next prime is 440443. The reversal of 440442 is 244044.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (440441) and next prime (440443).

It can be written as a sum of positive squares in only one way, i.e., 423801 + 16641 = 651^2 + 129^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 24469 = 440442 / (4 + 4 + 0 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (440441) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 12217 + ... + 12252.

2440442 is an apocalyptic number.

440442 is an abundant number, since it is smaller than the sum of its proper divisors (513888).

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

440442 is a wasteful number, since it uses less digits than its factorization.

440442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24477 (or 24474 counting only the distinct ones).

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

The square root of 440442 is about 663.6580444777. The cubic root of 440442 is about 76.0845089494.

Adding to 440442 its reverse (244044), we get a palindrome (684486).

It can be divided in two parts, 44044 and 2, that multiplied together give a palindrome (88088).

The spelling of 440442 in words is "four hundred forty thousand, four hundred forty-two", and thus it is an iban number.