1288415864 has 16 divisors (see below), whose sum is σ = 2422707000. Its totient is φ = 642360672.

The previous prime is 1288415833. The next prime is 1288415867. The reversal of 1288415864 is 4685148821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288415867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227942 + ... + 233525.

Almost surely, 2^1288415864 is an apocalyptic number.

It is an amenable number.

1288415864 is a deficient number, since it is larger than the sum of its proper divisors (1134291136).

1288415864 is a wasteful number, since it uses less digits than its factorization.

1288415864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461822 (or 461818 counting only the distinct ones).

The product of its digits is 491520, while the sum is 47.

The square root of 1288415864 is about 35894.5102209238. The cubic root of 1288415864 is about 1088.1414513863.

The spelling of 1288415864 in words is "one billion, two hundred eighty-eight million, four hundred fifteen thousand, eight hundred sixty-four".