1938861 has 12 divisors (see below), whose sum is σ = 2812992. Its totient is φ = 1286856.

The previous prime is 1938851. The next prime is 1938863. The reversal of 1938861 is 1688391.

It is not a de Polignac number, because 1938861 - 2⁵ = 1938829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3010 + ... + 3596.

It is an arithmetic number, because the mean of its divisors is an integer number (234416).

2^1938861 is an apocalyptic number.

It is an amenable number.

1938861 is a deficient number, since it is larger than the sum of its proper divisors (874131).

1938861 is a wasteful number, since it uses less digits than its factorization.

1938861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 957 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1938861 is about 1392.4298905151. The cubic root of 1938861 is about 124.6949575316.

The spelling of 1938861 in words is "one million, nine hundred thirty-eight thousand, eight hundred sixty-one".