1688049804 has 48 divisors (see below), whose sum is σ = 4593344000. Its totient is φ = 482298768.

The previous prime is 1688049773. The next prime is 1688049809. The reversal of 1688049804 is 4089408861.

It is not an unprimeable number, because it can be changed into a prime (1688049809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200944 + ... + 209175.

Almost surely, 2^1688049804 is an apocalyptic number.

1688049804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1688049804 is an abundant number, since it is smaller than the sum of its proper divisors (2905294196).

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

1688049804 is a wasteful number, since it uses less digits than its factorization.

1688049804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410147 (or 410131 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 1688049804 is about 41085.8832690743. The cubic root of 1688049804 is about 1190.6800726325.

The spelling of 1688049804 in words is "one billion, six hundred eighty-eight million, forty-nine thousand, eight hundred four".