1689607340 has 24 divisors (see below), whose sum is σ = 3601136112. Its totient is φ = 665755200.

The previous prime is 1689607267. The next prime is 1689607343. The reversal of 1689607340 is 437069861.

It is a junction number, because it is equal to n+sod(n) for n = 1689607291 and 1689607300.

It is not an unprimeable number, because it can be changed into a prime (1689607343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629111 + ... + 631790.

It is an arithmetic number, because the mean of its divisors is an integer number (150047338).

Almost surely, 2^1689607340 is an apocalyptic number.

1689607340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689607340 is an abundant number, since it is smaller than the sum of its proper divisors (1911528772).

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

1689607340 is a wasteful number, since it uses less digits than its factorization.

1689607340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260977 (or 1260975 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1689607340 is about 41104.8335357291. The cubic root of 1689607340 is about 1191.0461670816.

The spelling of 1689607340 in words is "one billion, six hundred eighty-nine million, six hundred seven thousand, three hundred forty".