1440471986 has 8 divisors (see below), whose sum is σ = 2162350080. Its totient is φ = 719688628.

The previous prime is 1440471979. The next prime is 1440471997. The reversal of 1440471986 is 6891740441.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270386 + ... + 275661.

It is an arithmetic number, because the mean of its divisors is an integer number (270293760).

Almost surely, 2^1440471986 is an apocalyptic number.

1440471986 is a deficient number, since it is larger than the sum of its proper divisors (721878094).

1440471986 is a wasteful number, since it uses less digits than its factorization.

1440471986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547368.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1440471986 is about 37953.5503741086. The cubic root of 1440471986 is about 1129.3665977998.

The spelling of 1440471986 in words is "one billion, four hundred forty million, four hundred seventy-one thousand, nine hundred eighty-six".