1693681328 has 20 divisors (see below), whose sum is σ = 3285520368. Its totient is φ = 845805120.

The previous prime is 1693681313. The next prime is 1693681333. The reversal of 1693681328 is 8231863961.

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, 51143 + ... + 77478.

Almost surely, 2^1693681328 is an apocalyptic number.

It is an amenable number.

1693681328 is a deficient number, since it is larger than the sum of its proper divisors (1591839040).

1693681328 is a wasteful number, since it uses less digits than its factorization.

1693681328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129452 (or 129446 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 1693681328 is about 41154.3597690451. The cubic root of 1693681328 is about 1192.0026838070.

The spelling of 1693681328 in words is "one billion, six hundred ninety-three million, six hundred eighty-one thousand, three hundred twenty-eight".