1287946608 has 160 divisors (see below), whose sum is σ = 3748093440. Its totient is φ = 378362880.

The previous prime is 1287946601. The next prime is 1287946631. The reversal of 1287946608 is 8066497821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287946601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1863543 + ... + 1864233.

It is an arithmetic number, because the mean of its divisors is an integer number (23425584).

Almost surely, 2^1287946608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287946608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874046720).

1287946608 is an abundant number, since it is smaller than the sum of its proper divisors (2460146832).

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

1287946608 is a wasteful number, since it uses less digits than its factorization.

1287946608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 1287946608 is about 35887.9730271856. The cubic root of 1287946608 is about 1088.0093307663.

The spelling of 1287946608 in words is "one billion, two hundred eighty-seven million, nine hundred forty-six thousand, six hundred eight".