1689000000 has 196 divisors, whose sum is σ = 5595865872. Its totient is φ = 449600000.

The previous prime is 1688999999. The next prime is 1689000067. The reversal of 1689000000 is 9861.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2999719 + ... + 3000281.

Almost surely, 2^1689000000 is an apocalyptic number.

1689000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2797932936).

1689000000 is an abundant number, since it is smaller than the sum of its proper divisors (3906865872).

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

1689000000 is an frugal number, since it uses more digits than its factorization.

1689000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1689000000 is about 41097.4451760690. The cubic root of 1689000000 is about 1190.9034402968.

Adding to 1689000000 its reverse (9861), we get a palindrome (1689009861).

The spelling of 1689000000 in words is "one billion, six hundred eighty-nine million", and thus it is an aban number.