1891916 has 12 divisors (see below), whose sum is σ = 3565632. Its totient is φ = 873168.

The previous prime is 1891909. The next prime is 1891927. The reversal of 1891916 is 6191981.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18140 + ... + 18243.

It is an arithmetic number, because the mean of its divisors is an integer number (297136).

2^1891916 is an apocalyptic number.

It is an amenable number.

1891916 is a deficient number, since it is larger than the sum of its proper divisors (1673716).

1891916 is a wasteful number, since it uses less digits than its factorization.

1891916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36400 (or 36398 counting only the distinct ones).

The product of its digits is 3888, while the sum is 35.

The square root of 1891916 is about 1375.4693744319. The cubic root of 1891916 is about 123.6803246863.

The spelling of 1891916 in words is "one million, eight hundred ninety-one thousand, nine hundred sixteen".