1865916 has 60 divisors (see below), whose sum is σ = 5264952. Its totient is φ = 572832.

The previous prime is 1865911. The next prime is 1865917. The reversal of 1865916 is 6195681.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1865911) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3991 + ... + 4433.

2^1865916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1865916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2632476).

1865916 is an abundant number, since it is smaller than the sum of its proper divisors (3399036).

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

1865916 is a wasteful number, since it uses less digits than its factorization.

1865916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 461 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1865916 is about 1365.9853586331. The cubic root of 1865916 is about 123.1111428486. Note that the first 4 decimals are identical.

The spelling of 1865916 in words is "one million, eight hundred sixty-five thousand, nine hundred sixteen".