1688604072 has 32 divisors (see below), whose sum is σ = 4293064800. Its totient is φ = 553327424.

The previous prime is 1688604019. The next prime is 1688604077. The reversal of 1688604072 is 2704068861.

It is not an unprimeable number, because it can be changed into a prime (1688604077) 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 7 ways as a sum of consecutive naturals, for example, 594843 + ... + 597674.

It is an arithmetic number, because the mean of its divisors is an integer number (134158275).

Almost surely, 2^1688604072 is an apocalyptic number.

1688604072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1688604072 is an abundant number, since it is smaller than the sum of its proper divisors (2604460728).

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

1688604072 is a wasteful number, since it uses less digits than its factorization.

1688604072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192585 (or 1192581 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1688604072 is about 41092.6279519818. The cubic root of 1688604072 is about 1190.8103775644.

The spelling of 1688604072 in words is "one billion, six hundred eighty-eight million, six hundred four thousand, seventy-two".