1689058640 has 40 divisors (see below), whose sum is σ = 3930284160. Its totient is φ = 675069056.

The previous prime is 1689058633. The next prime is 1689058663. The reversal of 1689058640 is 468509861.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 97517 + ... + 113523.

It is an arithmetic number, because the mean of its divisors is an integer number (98257104).

Almost surely, 2^1689058640 is an apocalyptic number.

1689058640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689058640 is an abundant number, since it is smaller than the sum of its proper divisors (2241225520).

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

1689058640 is a wasteful number, since it uses less digits than its factorization.

1689058640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17339 (or 17333 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 1689058640 is about 41098.1585962194. The cubic root of 1689058640 is about 1190.9172223709.

The spelling of 1689058640 in words is "one billion, six hundred eighty-nine million, fifty-eight thousand, six hundred forty".