1284439888 has 20 divisors (see below), whose sum is σ = 2490376320. Its totient is φ = 641762144.

The previous prime is 1284439883. The next prime is 1284439921. The reversal of 1284439888 is 8889344821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284439883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4870 + ... + 50917.

It is an arithmetic number, because the mean of its divisors is an integer number (124518816).

Almost surely, 2^1284439888 is an apocalyptic number.

It is an amenable number.

1284439888 is a deficient number, since it is larger than the sum of its proper divisors (1205936432).

1284439888 is a wasteful number, since it uses less digits than its factorization.

1284439888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57234 (or 57228 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 55.

The square root of 1284439888 is about 35839.0832472037. The cubic root of 1284439888 is about 1087.0209844041.

The spelling of 1284439888 in words is "one billion, two hundred eighty-four million, four hundred thirty-nine thousand, eight hundred eighty-eight".