1911916 has 12 divisors (see below), whose sum is σ = 3356640. Its totient is φ = 952880.

The previous prime is 1911911. The next prime is 1911919. The reversal of 1911916 is 6191191.

It is not an unprimeable number, because it can be changed into a prime (1911911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170 + ... + 2278.

It is an arithmetic number, because the mean of its divisors is an integer number (279720).

2^1911916 is an apocalyptic number.

It is an amenable number.

1911916 is a deficient number, since it is larger than the sum of its proper divisors (1444724).

1911916 is a wasteful number, since it uses less digits than its factorization.

1911916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1542 counting only the distinct ones).

The product of its digits is 486, while the sum is 28.

The square root of 1911916 is about 1382.7205068270. The cubic root of 1911916 is about 124.1146182666.

Subtracting 1911916 from its reverse (6191191), we obtain a triangular number (4279275 = T₂₉₂₅).

It can be divided in two parts, 19 and 11916, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 1911916 in words is "one million, nine hundred eleven thousand, nine hundred sixteen".