1284943916 has 24 divisors (see below), whose sum is σ = 2278469424. Its totient is φ = 633971520.

The previous prime is 1284943897. The next prime is 1284943943. The reversal of 1284943916 is 6193494821.

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, 361106 + ... + 364646.

It is an arithmetic number, because the mean of its divisors is an integer number (94936226).

Almost surely, 2^1284943916 is an apocalyptic number.

It is an amenable number.

1284943916 is a deficient number, since it is larger than the sum of its proper divisors (993525508).

1284943916 is a wasteful number, since it uses less digits than its factorization.

1284943916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721 (or 4719 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 1284943916 is about 35846.1143779908. The cubic root of 1284943916 is about 1087.1631520440.

It can be divided in two parts, 12849 and 43916, that added together give a palindrome (56765).

The spelling of 1284943916 in words is "one billion, two hundred eighty-four million, nine hundred forty-three thousand, nine hundred sixteen".