1284678896 has 30 divisors (see below), whose sum is σ = 2504928960. Its totient is φ = 638271328.

The previous prime is 1284678877. The next prime is 1284678907. The reversal of 1284678896 is 6988764821.

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 5 ways as a sum of consecutive naturals, for example, 444785 + ... + 447663.

It is an arithmetic number, because the mean of its divisors is an integer number (83497632).

Almost surely, 2^1284678896 is an apocalyptic number.

1284678896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1284678896 is a deficient number, since it is larger than the sum of its proper divisors (1220250064).

1284678896 is an equidigital number, since it uses as much as digits as its factorization.

1284678896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221 (or 3048 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 59.

The square root of 1284678896 is about 35842.4175523917. The cubic root of 1284678896 is about 1087.0884043487.

The spelling of 1284678896 in words is "one billion, two hundred eighty-four million, six hundred seventy-eight thousand, eight hundred ninety-six".