1816683340 has 12 divisors (see below), whose sum is σ = 3815035056. Its totient is φ = 726673328.

The previous prime is 1816683299. The next prime is 1816683353. The reversal of 1816683340 is 433866181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1816683293 and 1816683302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45417064 + ... + 45417103.

It is an arithmetic number, because the mean of its divisors is an integer number (317919588).

Almost surely, 2^1816683340 is an apocalyptic number.

1816683340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1816683340 is an abundant number, since it is smaller than the sum of its proper divisors (1998351716).

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

1816683340 is a wasteful number, since it uses less digits than its factorization.

1816683340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90834176 (or 90834174 counting only the distinct ones).

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

The square root of 1816683340 is about 42622.5684350439. The cubic root of 1816683340 is about 1220.1870491668.

The spelling of 1816683340 in words is "one billion, eight hundred sixteen million, six hundred eighty-three thousand, three hundred forty".