1212340444 has 24 divisors (see below), whose sum is σ = 2470432608. Its totient is φ = 509770560.

The previous prime is 1212340433. The next prime is 1212340453. The reversal of 1212340444 is 4440432121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406987 + ... + 409954.

It is an arithmetic number, because the mean of its divisors is an integer number (102934692).

Almost surely, 2^1212340444 is an apocalyptic number.

1212340444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1212340444 is an abundant number, since it is smaller than the sum of its proper divisors (1258092164).

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

1212340444 is a wasteful number, since it uses less digits than its factorization.

1212340444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817005 (or 817003 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1212340444 is about 34818.6795269436. The cubic root of 1212340444 is about 1066.2888417503.

Adding to 1212340444 its reverse (4440432121), we get a palindrome (5652772565).

The spelling of 1212340444 in words is "one billion, two hundred twelve million, three hundred forty thousand, four hundred forty-four".