1288699964 has 12 divisors (see below), whose sum is σ = 2255511888. Its totient is φ = 644268000.

The previous prime is 1288699963. The next prime is 1288700027. The reversal of 1288699964 is 4699968821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1288699897 and 1288699906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288699961) 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, 27209 + ... + 57599.

It is an arithmetic number, because the mean of its divisors is an integer number (187959324).

Almost surely, 2^1288699964 is an apocalyptic number.

It is an amenable number.

1288699964 is a deficient number, since it is larger than the sum of its proper divisors (966811924).

1288699964 is a wasteful number, since it uses less digits than its factorization.

1288699964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40996 (or 40994 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 62.

The square root of 1288699964 is about 35898.4674324685. The cubic root of 1288699964 is about 1088.2214251162.

The spelling of 1288699964 in words is "one billion, two hundred eighty-eight million, six hundred ninety-nine thousand, nine hundred sixty-four".