1865940 has 48 divisors (see below), whose sum is σ = 5285952. Its totient is φ = 491776.

The previous prime is 1865939. The next prime is 1865957. The reversal of 1865940 is 495681.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8107 + ... + 8333.

It is an arithmetic number, because the mean of its divisors is an integer number (110124).

2^1865940 is an apocalyptic number.

1865940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1865940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2642976).

1865940 is an abundant number, since it is smaller than the sum of its proper divisors (3420012).

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

1865940 is a wasteful number, since it uses less digits than its factorization.

1865940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1865940 is about 1365.9941434721. The cubic root of 1865940 is about 123.1116706778. Note that the first 3 decimals are identical.

The spelling of 1865940 in words is "one million, eight hundred sixty-five thousand, nine hundred forty".