1961688 has 16 divisors (see below), whose sum is σ = 4904280. Its totient is φ = 653888.

The previous prime is 1961683. The next prime is 1961737. The reversal of 1961688 is 8861691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40845 + ... + 40892.

2^1961688 is an apocalyptic number.

It is an amenable number.

1961688 is an abundant number, since it is smaller than the sum of its proper divisors (2942592).

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

1961688 is a wasteful number, since it uses less digits than its factorization.

1961688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81746 (or 81742 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 1961688 is about 1400.6027273999. The cubic root of 1961688 is about 125.1824110136.

The spelling of 1961688 in words is "one million, nine hundred sixty-one thousand, six hundred eighty-eight".