1861823146 has 8 divisors (see below), whose sum is σ = 2793583620. Its totient is φ = 930628608.

The previous prime is 1861823107. The next prime is 1861823147. The reversal of 1861823146 is 6413281681.

It can be written as a sum of positive squares in 2 ways, for example, as 1661459121 + 200364025 = 40761^2 + 14155^2 .

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 = 1861823099 and 1861823108.

It is not an unprimeable number, because it can be changed into a prime (1861823147) 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, 133161 + ... + 146476.

Almost surely, 2^1861823146 is an apocalyptic number.

1861823146 is a deficient number, since it is larger than the sum of its proper divisors (931760474).

1861823146 is a wasteful number, since it uses less digits than its factorization.

1861823146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282968.

The product of its digits is 55296, while the sum is 40.

The square root of 1861823146 is about 43148.8487216055. The cubic root of 1861823146 is about 1230.2106290976.

The spelling of 1861823146 in words is "one billion, eight hundred sixty-one million, eight hundred twenty-three thousand, one hundred forty-six".