1688323212 has 36 divisors (see below), whose sum is σ = 4281456816. Its totient is φ = 560961120.

The previous prime is 1688323201. The next prime is 1688323229. The reversal of 1688323212 is 2123238861.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64203 + ... + 86594.

It is an arithmetic number, because the mean of its divisors is an integer number (118929356).

Almost surely, 2^1688323212 is an apocalyptic number.

1688323212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1688323212 is an abundant number, since it is smaller than the sum of its proper divisors (2593133604).

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

1688323212 is a wasteful number, since it uses less digits than its factorization.

1688323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151118 (or 151113 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1688323212 is about 41089.2104085732. The cubic root of 1688323212 is about 1190.7443527034.

It can be divided in two parts, 1688 and 323212, that added together give a square (324900 = 570²).

The spelling of 1688323212 in words is "one billion, six hundred eighty-eight million, three hundred twenty-three thousand, two hundred twelve".