1816718328 has 64 divisors (see below), whose sum is σ = 5343300000. Its totient is φ = 569949696.

The previous prime is 1816718261. The next prime is 1816718329. The reversal of 1816718328 is 8238176181.

It is a happy number.

It is a super-2 number, since 2×1816718328² = 6600930966582231168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816718329) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 243703 + ... + 251046.

Almost surely, 2^1816718328 is an apocalyptic number.

1816718328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1816718328 is an abundant number, since it is smaller than the sum of its proper divisors (3526581672).

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

1816718328 is a wasteful number, since it uses less digits than its factorization.

1816718328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494781 (or 494771 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1816718328 is about 42622.9788729038. The cubic root of 1816718328 is about 1220.1948824216.

The spelling of 1816718328 in words is "one billion, eight hundred sixteen million, seven hundred eighteen thousand, three hundred twenty-eight".