1287966616 has 16 divisors (see below), whose sum is σ = 2471099400. Its totient is φ = 629006784.

The previous prime is 1287966611. The next prime is 1287966619. The reversal of 1287966616 is 6166697821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287966611) 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, 1871701 + ... + 1872388.

Almost surely, 2^1287966616 is an apocalyptic number.

It is an amenable number.

1287966616 is a deficient number, since it is larger than the sum of its proper divisors (1183132784).

1287966616 is a wasteful number, since it uses less digits than its factorization.

1287966616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744138 (or 3744134 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 1287966616 is about 35888.2517824427. The cubic root of 1287966616 is about 1088.0149647415.

The spelling of 1287966616 in words is "one billion, two hundred eighty-seven million, nine hundred sixty-six thousand, six hundred sixteen".