1861894 has 8 divisors (see below), whose sum is σ = 2798640. Its totient is φ = 929016.

The previous prime is 1861889. The next prime is 1861897. The reversal of 1861894 is 4981681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332 + ... + 2344.

It is an arithmetic number, because the mean of its divisors is an integer number (349830).

2^1861894 is an apocalyptic number.

1861894 is a deficient number, since it is larger than the sum of its proper divisors (936746).

1861894 is a wasteful number, since it uses less digits than its factorization.

1861894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934.

The product of its digits is 13824, while the sum is 37.

The square root of 1861894 is about 1364.5123671114. The cubic root of 1861894 is about 123.0226234632.

It can be divided in two parts, 186 and 1894, that added together give a triangular number (2080 = T₆₄).

The spelling of 1861894 in words is "one million, eight hundred sixty-one thousand, eight hundred ninety-four".