1284139488 has 48 divisors (see below), whose sum is σ = 3487110480. Its totient is φ = 413285376.

The previous prime is 1284139471. The next prime is 1284139537. The reversal of 1284139488 is 8849314821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 227845 + ... + 233412.

It is an arithmetic number, because the mean of its divisors is an integer number (72648135).

Almost surely, 2^1284139488 is an apocalyptic number.

It is an amenable number.

1284139488 is an abundant number, since it is smaller than the sum of its proper divisors (2202970992).

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

1284139488 is a wasteful number, since it uses less digits than its factorization.

1284139488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461299 (or 461291 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 1284139488 is about 35834.8920467189. The cubic root of 1284139488 is about 1086.9362349952.

The spelling of 1284139488 in words is "one billion, two hundred eighty-four million, one hundred thirty-nine thousand, four hundred eighty-eight".