1916878 has 4 divisors (see below), whose sum is σ = 2875320. Its totient is φ = 958438.

The previous prime is 1916867. The next prime is 1916881. The reversal of 1916878 is 8786191.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1916878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 479218 + ... + 479221.

It is an arithmetic number, because the mean of its divisors is an integer number (718830).

2^1916878 is an apocalyptic number.

1916878 is a deficient number, since it is larger than the sum of its proper divisors (958442).

1916878 is an equidigital number, since it uses as much as digits as its factorization.

1916878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958441.

The product of its digits is 24192, while the sum is 40.

The square root of 1916878 is about 1384.5136330134. The cubic root of 1916878 is about 124.2218971646.

The spelling of 1916878 in words is "one million, nine hundred sixteen thousand, eight hundred seventy-eight".