1861704 has 120 divisors (see below), whose sum is σ = 5978610. Its totient is φ = 539136.

The previous prime is 1861697. The next prime is 1861709. The reversal of 1861704 is 4071681.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1205604 + 656100 = 1098^2 + 810^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861709) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 109504 + ... + 109520.

2^1861704 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 1861704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2989305).

1861704 is an abundant number, since it is smaller than the sum of its proper divisors (4116906).

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

1861704 is a wasteful number, since it uses less digits than its factorization.

1861704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1861704 is about 1364.4427433938. The cubic root of 1861704 is about 123.0184386397.

The spelling of 1861704 in words is "one million, eight hundred sixty-one thousand, seven hundred four".