1811784342 has 16 divisors (see below), whose sum is σ = 3711948912. Its totient is φ = 589198080.

The previous prime is 1811784281. The next prime is 1811784343. The reversal of 1811784342 is 2434871181.

It is a self number, because there is not a number n which added to its sum of digits gives 1811784342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811784343) 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, 3682243 + ... + 3682734.

It is an arithmetic number, because the mean of its divisors is an integer number (231996807).

Almost surely, 2^1811784342 is an apocalyptic number.

1811784342 is an abundant number, since it is smaller than the sum of its proper divisors (1900164570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1811784342 is a wasteful number, since it uses less digits than its factorization.

1811784342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7365023.

The product of its digits is 43008, while the sum is 39.

The square root of 1811784342 is about 42565.0601080276. The cubic root of 1811784342 is about 1219.0892472662.

The spelling of 1811784342 in words is "one billion, eight hundred eleven million, seven hundred eighty-four thousand, three hundred forty-two".