1861916 has 24 divisors (see below), whose sum is σ = 3853920. Its totient is φ = 770112.

The previous prime is 1861913. The next prime is 1861921. The reversal of 1861916 is 6191681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335 + ... + 1958.

It is an arithmetic number, because the mean of its divisors is an integer number (160580).

2^1861916 is an apocalyptic number.

It is an amenable number.

1861916 is an abundant number, since it is smaller than the sum of its proper divisors (1992004).

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

1861916 is a wasteful number, since it uses less digits than its factorization.

1861916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333 (or 2331 counting only the distinct ones).

The product of its digits is 2592, while the sum is 32.

The square root of 1861916 is about 1364.5204285755. The cubic root of 1861916 is about 123.0231080034.

The spelling of 1861916 in words is "one million, eight hundred sixty-one thousand, nine hundred sixteen".