1916880 has 120 divisors (see below), whose sum is σ = 6954912. Its totient is φ = 435456.

The previous prime is 1916867. The next prime is 1916881. The reversal of 1916880 is 886191.

It is a tau number, because it is divible by the number of its divisors (120).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11679 + ... + 11841.

2^1916880 is an apocalyptic number.

1916880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3477456).

1916880 is an abundant number, since it is smaller than the sum of its proper divisors (5038032).

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

1916880 is a wasteful number, since it uses less digits than its factorization.

1916880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1916880 is about 1384.5143552885. The cubic root of 1916880 is about 124.2219403674.

The spelling of 1916880 in words is "one million, nine hundred sixteen thousand, eight hundred eighty".