1708869640 has 64 divisors (see below), whose sum is σ = 4038024960. Its totient is φ = 649608960.

The previous prime is 1708869623. The next prime is 1708869641. The reversal of 1708869640 is 469688071.

It is not an unprimeable number, because it can be changed into a prime (1708869641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138525 + ... + 150355.

It is an arithmetic number, because the mean of its divisors is an integer number (63094140).

Almost surely, 2^1708869640 is an apocalyptic number.

1708869640 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 1708869640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2019012480).

1708869640 is an abundant number, since it is smaller than the sum of its proper divisors (2329155320).

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

1708869640 is a wasteful number, since it uses less digits than its factorization.

1708869640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12022 (or 12018 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 1708869640 is about 41338.4765079702. The cubic root of 1708869640 is about 1195.5552329574. Note that the first 3 decimals are identical.

The spelling of 1708869640 in words is "one billion, seven hundred eight million, eight hundred sixty-nine thousand, six hundred forty".