1693440866 has 16 divisors (see below), whose sum is σ = 2768520384. Its totient is φ = 772170384.

The previous prime is 1693440863. The next prime is 1693440871. The reversal of 1693440866 is 6680443961.

It is a self number, because there is not a number n which added to its sum of digits gives 1693440866.

It is not an unprimeable number, because it can be changed into a prime (1693440863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390206 + ... + 394521.

It is an arithmetic number, because the mean of its divisors is an integer number (173032524).

Almost surely, 2^1693440866 is an apocalyptic number.

1693440866 is a deficient number, since it is larger than the sum of its proper divisors (1075079518).

1693440866 is a wasteful number, since it uses less digits than its factorization.

1693440866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784825.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 1693440866 is about 41151.4382008697. The cubic root of 1693440866 is about 1191.9462692362.

The spelling of 1693440866 in words is "one billion, six hundred ninety-three million, four hundred forty thousand, eight hundred sixty-six".