1916586 has 72 divisors (see below), whose sum is σ = 5041764. Its totient is φ = 524160.

The previous prime is 1916573. The next prime is 1916591. The reversal of 1916586 is 6856191.

It can be written as a sum of positive squares in 2 ways, for example, as 1863225 + 53361 = 1365^2 + 231^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1916586.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 36136 + ... + 36188.

2^1916586 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1916586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2520882).

1916586 is an abundant number, since it is smaller than the sum of its proper divisors (3125178).

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

1916586 is a wasteful number, since it uses less digits than its factorization.

1916586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 106 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1916586 is about 1384.4081768034. The cubic root of 1916586 is about 124.2155892278.

The spelling of 1916586 in words is "one million, nine hundred sixteen thousand, five hundred eighty-six".