1916664 has 16 divisors (see below), whose sum is σ = 4791720. Its totient is φ = 638880.

The previous prime is 1916653. The next prime is 1916687. The reversal of 1916664 is 4666191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39907 + ... + 39954.

2^1916664 is an apocalyptic number.

It is an amenable number.

1916664 is an abundant number, since it is smaller than the sum of its proper divisors (2875056).

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

1916664 is a wasteful number, since it uses less digits than its factorization.

1916664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79870 (or 79866 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 1916664 is about 1384.4363473992. The cubic root of 1916664 is about 124.2172742873.

The spelling of 1916664 in words is "one million, nine hundred sixteen thousand, six hundred sixty-four".