1688340916 has 12 divisors (see below), whose sum is σ = 2991997120. Its totient is φ = 833484600.

The previous prime is 1688340889. The next prime is 1688340919. The reversal of 1688340916 is 6190438861.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688340919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2671110 + ... + 2671741.

Almost surely, 2^1688340916 is an apocalyptic number.

It is an amenable number.

1688340916 is a deficient number, since it is larger than the sum of its proper divisors (1303656204).

1688340916 is a wasteful number, since it uses less digits than its factorization.

1688340916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5342934 (or 5342932 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 1688340916 is about 41089.4258416931. The cubic root of 1688340916 is about 1190.7485147944.

The spelling of 1688340916 in words is "one billion, six hundred eighty-eight million, three hundred forty thousand, nine hundred sixteen".