1916904 has 64 divisors (see below), whose sum is σ = 5365440. Its totient is φ = 565760.

The previous prime is 1916881. The next prime is 1916909. The reversal of 1916904 is 4096191.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1916909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13924 + ... + 14060.

It is an arithmetic number, because the mean of its divisors is an integer number (83835).

2^1916904 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 1916904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2682720).

1916904 is an abundant number, since it is smaller than the sum of its proper divisors (3448536).

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

1916904 is a wasteful number, since it uses less digits than its factorization.

1916904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1916904 is about 1384.5230225605. The cubic root of 1916904 is about 124.2224587991. Note that the first 3 decimals are identical.

The spelling of 1916904 in words is "one million, nine hundred sixteen thousand, nine hundred four".