1806538944 has 56 divisors (see below), whose sum is σ = 5462633728. Its totient is φ = 516153600.

The previous prime is 1806538931. The next prime is 1806538967. The reversal of 1806538944 is 4498356081.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1806538893 and 1806538902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670732 + ... + 673419.

Almost surely, 2^1806538944 is an apocalyptic number.

1806538944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1806538944 is an abundant number, since it is smaller than the sum of its proper divisors (3656094784).

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

1806538944 is a wasteful number, since it uses less digits than its factorization.

1806538944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344173 (or 1344163 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 1806538944 is about 42503.3992052400. The cubic root of 1806538944 is about 1217.9116256209.

The spelling of 1806538944 in words is "one billion, eight hundred six million, five hundred thirty-eight thousand, nine hundred forty-four".