1816703380 has 12 divisors (see below), whose sum is σ = 3815077140. Its totient is φ = 726681344.

The previous prime is 1816703353. The next prime is 1816703381. The reversal of 1816703380 is 833076181.

It can be written as a sum of positive squares in 2 ways, for example, as 229159044 + 1587544336 = 15138^2 + 39844^2 .

It is a super-2 number, since 2×1816703380² = 6600822341806848800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816703381) by changing a digit.

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, 45417565 + ... + 45417604.

It is an arithmetic number, because the mean of its divisors is an integer number (317923095).

Almost surely, 2^1816703380 is an apocalyptic number.

1816703380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1816703380 is an abundant number, since it is smaller than the sum of its proper divisors (1998373760).

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

1816703380 is a wasteful number, since it uses less digits than its factorization.

1816703380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90835178 (or 90835176 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1816703380 is about 42622.8035211200. The cubic root of 1816703380 is about 1220.1915358153.

The spelling of 1816703380 in words is "one billion, eight hundred sixteen million, seven hundred three thousand, three hundred eighty".