1688233396 has 48 divisors (see below), whose sum is σ = 3139355520. Its totient is φ = 792760320.

The previous prime is 1688233381. The next prime is 1688233409. The reversal of 1688233396 is 6933328861.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 1239756 + ... + 1241116.

It is an arithmetic number, because the mean of its divisors is an integer number (65403240).

Almost surely, 2^1688233396 is an apocalyptic number.

It is an amenable number.

1688233396 is a deficient number, since it is larger than the sum of its proper divisors (1451122124).

1688233396 is a wasteful number, since it uses less digits than its factorization.

1688233396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1622 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The square root of 1688233396 is about 41088.1174550502. The cubic root of 1688233396 is about 1190.7232371195.

The spelling of 1688233396 in words is "one billion, six hundred eighty-eight million, two hundred thirty-three thousand, three hundred ninety-six".