1144663986 has 16 divisors (see below), whose sum is σ = 2289722400. Its totient is φ = 381488928.

The previous prime is 1144663981. The next prime is 1144664021. The reversal of 1144663986 is 6893664411.

It is a super-3 number, since 3×1144663986³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1144663981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32505 + ... + 57843.

It is an arithmetic number, because the mean of its divisors is an integer number (143107650).

Almost surely, 2^1144663986 is an apocalyptic number.

1144663986 is an abundant number, since it is smaller than the sum of its proper divisors (1145058414).

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

1144663986 is a wasteful number, since it uses less digits than its factorization.

1144663986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32873.

The product of its digits is 746496, while the sum is 48.

The square root of 1144663986 is about 33832.8832055443. The cubic root of 1144663986 is about 1046.0666096577.

The spelling of 1144663986 in words is "one billion, one hundred forty-four million, six hundred sixty-three thousand, nine hundred eighty-six".