1140809816 has 8 divisors (see below), whose sum is σ = 2139018420. Its totient is φ = 570404904.

The previous prime is 1140809777. The next prime is 1140809833. The reversal of 1140809816 is 6189080411.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1140809816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71300606 + ... + 71300621.

Almost surely, 2^1140809816 is an apocalyptic number.

It is an amenable number.

1140809816 is a deficient number, since it is larger than the sum of its proper divisors (998208604).

1140809816 is a wasteful number, since it uses less digits than its factorization.

1140809816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142601233 (or 142601229 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 1140809816 is about 33775.8762432598. The cubic root of 1140809816 is about 1044.8912277374.

The spelling of 1140809816 in words is "one billion, one hundred forty million, eight hundred nine thousand, eight hundred sixteen".