1806433040 has 20 divisors (see below), whose sum is σ = 4199957004. Its totient is φ = 722573184.

The previous prime is 1806433021. The next prime is 1806433043. The reversal of 1806433040 is 403346081.

It can be written as a sum of positive squares in 2 ways, for example, as 1328748304 + 477684736 = 36452^2 + 21856^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1806432994 and 1806433012.

It is not an unprimeable number, because it can be changed into a prime (1806433043) 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, 11290127 + ... + 11290286.

Almost surely, 2^1806433040 is an apocalyptic number.

1806433040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806433040 is an abundant number, since it is smaller than the sum of its proper divisors (2393523964).

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

1806433040 is a wasteful number, since it uses less digits than its factorization.

1806433040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22580426 (or 22580420 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1806433040 is about 42502.1533572124. The cubic root of 1806433040 is about 1217.8878261094.

The spelling of 1806433040 in words is "one billion, eight hundred six million, four hundred thirty-three thousand, forty".