1688274812 has 24 divisors (see below), whose sum is σ = 3445461600. Its totient is φ = 723545760.

The previous prime is 1688274799. The next prime is 1688274859. The reversal of 1688274812 is 2184728861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613889 + ... + 616632.

It is an arithmetic number, because the mean of its divisors is an integer number (143560900).

Almost surely, 2^1688274812 is an apocalyptic number.

It is an amenable number.

1688274812 is an abundant number, since it is smaller than the sum of its proper divisors (1757186788).

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

1688274812 is a wasteful number, since it uses less digits than its factorization.

1688274812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230546 (or 1230530 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The square root of 1688274812 is about 41088.6214419515. The cubic root of 1688274812 is about 1190.7329740415.

The spelling of 1688274812 in words is "one billion, six hundred eighty-eight million, two hundred seventy-four thousand, eight hundred twelve".