1286996816 has 20 divisors (see below), whose sum is σ = 2849778912. Its totient is φ = 551570016.

The previous prime is 1286996803. The next prime is 1286996857. The reversal of 1286996816 is 6186996821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5745410 + ... + 5745633.

Almost surely, 2^1286996816 is an apocalyptic number.

1286996816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1286996816 is an abundant number, since it is smaller than the sum of its proper divisors (1562782096).

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

1286996816 is a wasteful number, since it uses less digits than its factorization.

1286996816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11491058 (or 11491052 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 56.

The square root of 1286996816 is about 35874.7378527007. The cubic root of 1286996816 is about 1087.7418153591.

The spelling of 1286996816 in words is "one billion, two hundred eighty-six million, nine hundred ninety-six thousand, eight hundred sixteen".