1881444742 has 4 divisors (see below), whose sum is σ = 2822167116. Its totient is φ = 940722370.

The previous prime is 1881444679. The next prime is 1881444767. The reversal of 1881444742 is 2474441881.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470361184 + ... + 470361187.

It is an arithmetic number, because the mean of its divisors is an integer number (705541779).

Almost surely, 2^1881444742 is an apocalyptic number.

1881444742 is a deficient number, since it is larger than the sum of its proper divisors (940722374).

1881444742 is an equidigital number, since it uses as much as digits as its factorization.

1881444742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940722373.

The product of its digits is 229376, while the sum is 43.

The square root of 1881444742 is about 43375.6238226034. The cubic root of 1881444742 is about 1234.5172304854.

The spelling of 1881444742 in words is "one billion, eight hundred eighty-one million, four hundred forty-four thousand, seven hundred forty-two".