1689958960 has 20 divisors (see below), whose sum is σ = 3929154768. Its totient is φ = 675983552.

The previous prime is 1689958943. The next prime is 1689958973. The reversal of 1689958960 is 698599861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1689958960² = 5711922572968563200, which contains 22 as substring.

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, 10562164 + ... + 10562323.

Almost surely, 2^1689958960 is an apocalyptic number.

1689958960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689958960 is an abundant number, since it is smaller than the sum of its proper divisors (2239195808).

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

1689958960 is a wasteful number, since it uses less digits than its factorization.

1689958960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21124500 (or 21124494 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 61.

The square root of 1689958960 is about 41109.1104257925. The cubic root of 1689958960 is about 1191.1287832405.

The spelling of 1689958960 in words is "one billion, six hundred eighty-nine million, nine hundred fifty-eight thousand, nine hundred sixty".