1809782942 has 8 divisors (see below), whose sum is σ = 2961463032. Its totient is φ = 822628600.

The previous prime is 1809782941. The next prime is 1809782951. The reversal of 1809782942 is 2492879081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809782941) 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 3 ways as a sum of consecutive naturals, for example, 41131409 + ... + 41131452.

It is an arithmetic number, because the mean of its divisors is an integer number (370182879).

Almost surely, 2^1809782942 is an apocalyptic number.

1809782942 is a deficient number, since it is larger than the sum of its proper divisors (1151680090).

1809782942 is a wasteful number, since it uses less digits than its factorization.

1809782942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82262874.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 1809782942 is about 42541.5437190519. The cubic root of 1809782942 is about 1218.6401901081.

The spelling of 1809782942 in words is "one billion, eight hundred nine million, seven hundred eighty-two thousand, nine hundred forty-two".