1689732456 has 32 divisors (see below), whose sum is σ = 4228070400. Its totient is φ = 562745600.

The previous prime is 1689732449. The next prime is 1689732481. The reversal of 1689732456 is 6542379861.

It is a junction number, because it is equal to n+sod(n) for n = 1689732399 and 1689732408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2961 + ... + 58208.

It is an arithmetic number, because the mean of its divisors is an integer number (132127200).

Almost surely, 2^1689732456 is an apocalyptic number.

It is an amenable number.

1689732456 is an abundant number, since it is smaller than the sum of its proper divisors (2538337944).

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

1689732456 is a wasteful number, since it uses less digits than its factorization.

1689732456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62329 (or 62325 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 1689732456 is about 41106.3554210295. The cubic root of 1689732456 is about 1191.0755654810.

The spelling of 1689732456 in words is "one billion, six hundred eighty-nine million, seven hundred thirty-two thousand, four hundred fifty-six".