1284383778 has 8 divisors (see below), whose sum is σ = 2568767568. Its totient is φ = 428127924.

The previous prime is 1284383743. The next prime is 1284383801. The reversal of 1284383778 is 8773834821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1284383778 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1284383778.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 107031976 + ... + 107031987.

It is an arithmetic number, because the mean of its divisors is an integer number (321095946).

Almost surely, 2^1284383778 is an apocalyptic number.

1284383778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1284383778 is a wasteful number, since it uses less digits than its factorization.

1284383778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214063968.

The product of its digits is 1806336, while the sum is 51.

The square root of 1284383778 is about 35838.3004340329. The cubic root of 1284383778 is about 1087.0051555498.

The spelling of 1284383778 in words is "one billion, two hundred eighty-four million, three hundred eighty-three thousand, seven hundred seventy-eight".