1912688 has 20 divisors (see below), whose sum is σ = 3732648. Its totient is φ = 949440.

The previous prime is 1912681. The next prime is 1912693. The reversal of 1912688 is 8862191.

It is a Cunningham number, because it is equal to 1383²-1.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912681) 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, 2423 + ... + 3113.

2^1912688 is an apocalyptic number.

It is an amenable number.

1912688 is a deficient number, since it is larger than the sum of its proper divisors (1819960).

1912688 is a wasteful number, since it uses less digits than its factorization.

1912688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 866 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 1912688 is about 1382.9996384671. Note that the first 3 decimals coincide. The cubic root of 1912688 is about 124.1313211608.

The spelling of 1912688 in words is "one million, nine hundred twelve thousand, six hundred eighty-eight".