1909968 has 20 divisors (see below), whose sum is σ = 4934208. Its totient is φ = 636640.

The previous prime is 1909951. The next prime is 1909981. The reversal of 1909968 is 8699091.

It is a super-2 number, since 2×1909968² = 7295955522048, which contains 22 as substring.

It is a congruent number.

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, 19848 + ... + 19943.

2^1909968 is an apocalyptic number.

It is an amenable number.

1909968 is an abundant number, since it is smaller than the sum of its proper divisors (3024240).

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

1909968 is a wasteful number, since it uses less digits than its factorization.

1909968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39802 (or 39796 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 1909968 is about 1382.0159188663. The cubic root of 1909968 is about 124.0724515892.

The spelling of 1909968 in words is "one million, nine hundred nine thousand, nine hundred sixty-eight".