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12440431210 = 251489835489
BaseRepresentation
bin10111001011000000…
…11110101001101010
31012002222212101101111
423211200132221222
5200434222244320
65414241340534
7620166630514
oct134540365152
935088771344
1012440431210
115304332109
1224b233774a
131233490ccc
14860308bb4
154cc26da5a
hex2e581ea6a

12440431210 has 16 divisors (see below), whose sum is σ = 22407841800. Its totient is φ = 4972824576.

The previous prime is 12440431189. The next prime is 12440431219. The reversal of 12440431210 is 1213404421.

It is a happy number.

12440431210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11070617089 + 1369814121 = 105217^2 + 37011^2 .

It is not an unprimeable number, because it can be changed into a prime (12440431219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402855 + ... + 432634.

Almost surely, 212440431210 is an apocalyptic number.

12440431210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12440431210 is a deficient number, since it is larger than the sum of its proper divisors (9967410590).

12440431210 is a wasteful number, since it uses less digits than its factorization.

12440431210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836985.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12440431210 its reverse (1213404421), we get a palindrome (13653835631).

The spelling of 12440431210 in words is "twelve billion, four hundred forty million, four hundred thirty-one thousand, two hundred ten".

Divisors: 1 2 5 10 1489 2978 7445 14890 835489 1670978 4177445 8354890 1244043121 2488086242 6220215605 12440431210