1689434900 has 36 divisors (see below), whose sum is σ = 3784341120. Its totient is φ = 653973600.

The previous prime is 1689434897. The next prime is 1689434947. The reversal of 1689434900 is 94349861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269390 + ... + 275589.

Almost surely, 2^1689434900 is an apocalyptic number.

1689434900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689434900 is an abundant number, since it is smaller than the sum of its proper divisors (2094906220).

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

1689434900 is a wasteful number, since it uses less digits than its factorization.

1689434900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545024 (or 545017 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1689434900 is about 41102.7359186709. The cubic root of 1689434900 is about 1191.0056466239.

The spelling of 1689434900 in words is "one billion, six hundred eighty-nine million, four hundred thirty-four thousand, nine hundred".