1212344878 has 16 divisors (see below), whose sum is σ = 1831021920. Its totient is φ = 602013600.

The previous prime is 1212344839. The next prime is 1212344891. The reversal of 1212344878 is 8784432121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212344878.

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, 338863 + ... + 342421.

It is an arithmetic number, because the mean of its divisors is an integer number (114438870).

Almost surely, 2^1212344878 is an apocalyptic number.

1212344878 is a deficient number, since it is larger than the sum of its proper divisors (618677042).

1212344878 is a wasteful number, since it uses less digits than its factorization.

1212344878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683.

The product of its digits is 86016, while the sum is 40.

The square root of 1212344878 is about 34818.7431996044. The cubic root of 1212344878 is about 1066.2901416929.

Adding to 1212344878 its reverse (8784432121), we get a palindrome (9996776999).

The spelling of 1212344878 in words is "one billion, two hundred twelve million, three hundred forty-four thousand, eight hundred seventy-eight".