1861826 has 8 divisors (see below), whose sum is σ = 2809404. Its totient is φ = 925360.

The previous prime is 1861817. The next prime is 1861831. The reversal of 1861826 is 6281681.

It can be written as a sum of positive squares in 2 ways, for example, as 1819801 + 42025 = 1349^2 + 205^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1861792 and 1861801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2345 + ... + 3036.

2^1861826 is an apocalyptic number.

1861826 is a deficient number, since it is larger than the sum of its proper divisors (947578).

1861826 is a wasteful number, since it uses less digits than its factorization.

1861826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556.

The product of its digits is 4608, while the sum is 32.

The square root of 1861826 is about 1364.4874495575. The cubic root of 1861826 is about 123.0211257696.

The spelling of 1861826 in words is "one million, eight hundred sixty-one thousand, eight hundred twenty-six".