1688425794 has 24 divisors (see below), whose sum is σ = 3990825072. Its totient is φ = 511644120.

The previous prime is 1688425793. The next prime is 1688425799. The reversal of 1688425794 is 4975248861.

It is a happy number.

1688425794 is a `hidden beast` number, since 1 + 68 + 8 + 4 + 2 + 579 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1688425794.

It is not an unprimeable number, because it can be changed into a prime (1688425793) 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 11 ways as a sum of consecutive naturals, for example, 4263504 + ... + 4263899.

It is an arithmetic number, because the mean of its divisors is an integer number (166284378).

Almost surely, 2^1688425794 is an apocalyptic number.

1688425794 is an abundant number, since it is smaller than the sum of its proper divisors (2302399278).

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

1688425794 is a wasteful number, since it uses less digits than its factorization.

1688425794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527422 (or 8527419 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 1688425794 is about 41090.4586735169. The cubic root of 1688425794 is about 1190.7684686354.

The spelling of 1688425794 in words is "one billion, six hundred eighty-eight million, four hundred twenty-five thousand, seven hundred ninety-four".