1689450768 has 60 divisors (see below), whose sum is σ = 4731677808. Its totient is φ = 562726080.

The previous prime is 1689450757. The next prime is 1689450773. The reversal of 1689450768 is 8670549861.

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, 230683 + ... + 237893.

Almost surely, 2^1689450768 is an apocalyptic number.

1689450768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1689450768 is an abundant number, since it is smaller than the sum of its proper divisors (3042227040).

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

1689450768 is a wasteful number, since it uses less digits than its factorization.

1689450768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8852 (or 8843 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 1689450768 is about 41102.9289467308. The cubic root of 1689450768 is about 1191.0093754483.

The spelling of 1689450768 in words is "one billion, six hundred eighty-nine million, four hundred fifty thousand, seven hundred sixty-eight".