1800816436 has 12 divisors (see below), whose sum is σ = 3224718112. Its totient is φ = 879468408.

The previous prime is 1800816431. The next prime is 1800816449. The reversal of 1800816436 is 6346180081.

It is a junction number, because it is equal to n+sod(n) for n = 1800816395 and 1800816404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800816431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5234760 + ... + 5235103.

Almost surely, 2^1800816436 is an apocalyptic number.

It is an amenable number.

1800816436 is a deficient number, since it is larger than the sum of its proper divisors (1423901676).

1800816436 is a wasteful number, since it uses less digits than its factorization.

1800816436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10469910 (or 10469908 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1800816436 is about 42436.0275709214. The cubic root of 1800816436 is about 1216.6242871917.

The spelling of 1800816436 in words is "one billion, eight hundred million, eight hundred sixteen thousand, four hundred thirty-six".