1284807328 has 24 divisors (see below), whose sum is σ = 2890816992. Its totient is φ = 550631616.

The previous prime is 1284807313. The next prime is 1284807331. The reversal of 1284807328 is 8237084821.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2867650 + ... + 2868097.

It is an arithmetic number, because the mean of its divisors is an integer number (120450708).

Almost surely, 2^1284807328 is an apocalyptic number.

It is an amenable number.

1284807328 is an abundant number, since it is smaller than the sum of its proper divisors (1606009664).

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

1284807328 is an equidigital number, since it uses as much as digits as its factorization.

1284807328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735764 (or 5735756 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 1284807328 is about 35844.2091278354. The cubic root of 1284807328 is about 1087.1246292985.

The spelling of 1284807328 in words is "one billion, two hundred eighty-four million, eight hundred seven thousand, three hundred twenty-eight".