1939688 has 16 divisors (see below), whose sum is σ = 3735780. Its totient is φ = 943488.

The previous prime is 1939681. The next prime is 1939699. The reversal of 1939688 is 8869391.

It can be written as a sum of positive squares in 2 ways, for example, as 1898884 + 40804 = 1378^2 + 202^2 .

It is not an unprimeable number, because it can be changed into a prime (1939681) 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, 2981 + ... + 3572.

2^1939688 is an apocalyptic number.

It is an amenable number.

1939688 is a deficient number, since it is larger than the sum of its proper divisors (1796092).

1939688 is a wasteful number, since it uses less digits than its factorization.

1939688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6596 (or 6592 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 1939688 is about 1392.7268217422. The cubic root of 1939688 is about 124.7126841026.

The spelling of 1939688 in words is "one million, nine hundred thirty-nine thousand, six hundred eighty-eight".