1689398046 has 40 divisors (see below), whose sum is σ = 4326292080. Its totient is φ = 482684832.

The previous prime is 1689398021. The next prime is 1689398119. The reversal of 1689398046 is 6408939861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1689397983 and 1689398001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 743751 + ... + 746018.

It is an arithmetic number, because the mean of its divisors is an integer number (108157302).

Almost surely, 2^1689398046 is an apocalyptic number.

1689398046 is an abundant number, since it is smaller than the sum of its proper divisors (2636894034).

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

1689398046 is a wasteful number, since it uses less digits than its factorization.

1689398046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489790 (or 1489781 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 1689398046 is about 41102.2876005704. The cubic root of 1689398046 is about 1190.9969862051.

The spelling of 1689398046 in words is "one billion, six hundred eighty-nine million, three hundred ninety-eight thousand, forty-six".