1688913256 has 16 divisors (see below), whose sum is σ = 3187686240. Its totient is φ = 838863600.

The previous prime is 1688913221. The next prime is 1688913293. The reversal of 1688913256 is 6523198861.

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, 697846 + ... + 700261.

It is an arithmetic number, because the mean of its divisors is an integer number (199230390).

Almost surely, 2^1688913256 is an apocalyptic number.

It is an amenable number.

1688913256 is a deficient number, since it is larger than the sum of its proper divisors (1498772984).

1688913256 is a wasteful number, since it uses less digits than its factorization.

1688913256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398264 (or 1398260 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 1688913256 is about 41096.3898171117. The cubic root of 1688913256 is about 1190.8830523954.

The spelling of 1688913256 in words is "one billion, six hundred eighty-eight million, nine hundred thirteen thousand, two hundred fifty-six".