1916688 has 40 divisors (see below), whose sum is σ = 5028448. Its totient is φ = 628992.

The previous prime is 1916687. The next prime is 1916689. The reversal of 1916688 is 8866191.

It is an interprime number because it is at equal distance from previous prime (1916687) and next prime (1916689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3231 + ... + 3777.

2^1916688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2514224).

1916688 is an abundant number, since it is smaller than the sum of its proper divisors (3111760).

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

1916688 is a wasteful number, since it uses less digits than its factorization.

1916688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 625 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 1916688 is about 1384.4450151595. The cubic root of 1916688 is about 124.2177927579.

The spelling of 1916688 in words is "one million, nine hundred sixteen thousand, six hundred eighty-eight".