1861049443 has 8 divisors (see below), whose sum is σ = 2095727616. Its totient is φ = 1637286600.

The previous prime is 1861049431. The next prime is 1861049461. The reversal of 1861049443 is 3449401681.

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

It is a cyclic number.

It is not a de Polignac number, because 1861049443 - 2²⁵ = 1827495011 is a prime.

It is a super-2 number, since 2×1861049443² = 6927010058581220498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1861049396 and 1861049405.

It is not an unprimeable number, because it can be changed into a prime (1861049413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2728471 + ... + 2729152.

It is an arithmetic number, because the mean of its divisors is an integer number (261965952).

Almost surely, 2^1861049443 is an apocalyptic number.

1861049443 is a deficient number, since it is larger than the sum of its proper divisors (234678173).

1861049443 is a wasteful number, since it uses less digits than its factorization.

1861049443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457665.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1861049443 is about 43139.8822784671. The cubic root of 1861049443 is about 1230.0401958794.

The spelling of 1861049443 in words is "one billion, eight hundred sixty-one million, forty-nine thousand, four hundred forty-three".