1813975768 has 32 divisors (see below), whose sum is σ = 3773304000. Its totient is φ = 810556960.

The previous prime is 1813975741. The next prime is 1813975777. The reversal of 1813975768 is 8675793181.

It is a happy number.

It is a congruent number.

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, 169498 + ... + 179881.

It is an arithmetic number, because the mean of its divisors is an integer number (117915750).

Almost surely, 2^1813975768 is an apocalyptic number.

It is an amenable number.

1813975768 is an abundant number, since it is smaller than the sum of its proper divisors (1959328232).

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

1813975768 is a wasteful number, since it uses less digits than its factorization.

1813975768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349455 (or 349451 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 55.

The square root of 1813975768 is about 42590.7944044250. The cubic root of 1813975768 is about 1219.5805617163.

The spelling of 1813975768 in words is "one billion, eight hundred thirteen million, nine hundred seventy-five thousand, seven hundred sixty-eight".