1284578916 has 24 divisors (see below), whose sum is σ = 3048155040. Its totient is φ = 420935232.

The previous prime is 1284578909. The next prime is 1284578917. The reversal of 1284578916 is 6198754821.

It is not an unprimeable number, because it can be changed into a prime (1284578917) by changing a digit.

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, 906481 + ... + 907896.

It is an arithmetic number, because the mean of its divisors is an integer number (127006460).

Almost surely, 2^1284578916 is an apocalyptic number.

It is an amenable number.

1284578916 is an abundant number, since it is smaller than the sum of its proper divisors (1763576124).

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

1284578916 is a wasteful number, since it uses less digits than its factorization.

1284578916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814443 (or 1814441 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The square root of 1284578916 is about 35841.0228090661. The cubic root of 1284578916 is about 1087.0602027701.

The spelling of 1284578916 in words is "one billion, two hundred eighty-four million, five hundred seventy-eight thousand, nine hundred sixteen".