1816231782 has 16 divisors (see below), whose sum is σ = 3749640192. Its totient is φ = 585881160.

The previous prime is 1816231723. The next prime is 1816231801. The reversal of 1816231782 is 2871326181.

It is a self number, because there is not a number n which added to its sum of digits gives 1816231782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4882158 + ... + 4882529.

It is an arithmetic number, because the mean of its divisors is an integer number (234352512).

Almost surely, 2^1816231782 is an apocalyptic number.

1816231782 is an abundant number, since it is smaller than the sum of its proper divisors (1933408410).

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

1816231782 is a wasteful number, since it uses less digits than its factorization.

1816231782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764723.

The product of its digits is 32256, while the sum is 39.

The square root of 1816231782 is about 42617.2709356195. The cubic root of 1816231782 is about 1220.0859435111.

The spelling of 1816231782 in words is "one billion, eight hundred sixteen million, two hundred thirty-one thousand, seven hundred eighty-two".