1288398616 has 16 divisors (see below), whose sum is σ = 2416271040. Its totient is φ = 644059680.

The previous prime is 1288398599. The next prime is 1288398619. The reversal of 1288398616 is 6168938821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288398619) 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, 29050 + ... + 58486.

It is an arithmetic number, because the mean of its divisors is an integer number (151016940).

Almost surely, 2^1288398616 is an apocalyptic number.

It is an amenable number.

1288398616 is a deficient number, since it is larger than the sum of its proper divisors (1127872424).

1288398616 is a wasteful number, since it uses less digits than its factorization.

1288398616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34914 (or 34910 counting only the distinct ones).

The product of its digits is 995328, while the sum is 52.

The square root of 1288398616 is about 35894.2699605383. The cubic root of 1288398616 is about 1088.1365957213.

The spelling of 1288398616 in words is "one billion, two hundred eighty-eight million, three hundred ninety-eight thousand, six hundred sixteen".