1144156866 has 32 divisors (see below), whose sum is σ = 2383077888. Its totient is φ = 365809920.

The previous prime is 1144156841. The next prime is 1144156879. The reversal of 1144156866 is 6686514411.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6201 + ... + 48236.

It is an arithmetic number, because the mean of its divisors is an integer number (74471184).

Almost surely, 2^1144156866 is an apocalyptic number.

1144156866 is an abundant number, since it is smaller than the sum of its proper divisors (1238921022).

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

1144156866 is a wasteful number, since it uses less digits than its factorization.

1144156866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54586.

The product of its digits is 138240, while the sum is 42.

The square root of 1144156866 is about 33825.3878913458. The cubic root of 1144156866 is about 1045.9121073571.

The spelling of 1144156866 in words is "one billion, one hundred forty-four million, one hundred fifty-six thousand, eight hundred sixty-six".