1688135226 has 8 divisors (see below), whose sum is σ = 3376270464. Its totient is φ = 562711740.

The previous prime is 1688135219. The next prime is 1688135233. The reversal of 1688135226 is 6225318861.

It is an interprime number because it is at equal distance from previous prime (1688135219) and next prime (1688135233).

It is a sphenic number, since it is the product of 3 distinct primes.

1688135226 is an admirable number.

It is a super-3 number, since 3×1688135226³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140677930 + ... + 140677941.

It is an arithmetic number, because the mean of its divisors is an integer number (422033808).

Almost surely, 2^1688135226 is an apocalyptic number.

1688135226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1688135226 is a wasteful number, since it uses less digits than its factorization.

1688135226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281355876.

The product of its digits is 138240, while the sum is 42.

The square root of 1688135226 is about 41086.9228100621. The cubic root of 1688135226 is about 1190.7001566682.

The spelling of 1688135226 in words is "one billion, six hundred eighty-eight million, one hundred thirty-five thousand, two hundred twenty-six".