311489642 has 8 divisors (see below), whose sum is σ = 467314500. Its totient is φ = 155718144.

The previous prime is 311489641. The next prime is 311489681. The reversal of 311489642 is 246984113.

It can be written as a sum of positive squares in 2 ways, for example, as 275261281 + 36228361 = 16591^2 + 6019^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 311489596 and 311489605.

It is not an unprimeable number, because it can be changed into a prime (311489641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8234 + ... + 26282.

Almost surely, 2^311489642 is an apocalyptic number.

311489642 is a deficient number, since it is larger than the sum of its proper divisors (155824858).

311489642 is a wasteful number, since it uses less digits than its factorization.

311489642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26680.

The product of its digits is 41472, while the sum is 38.

The square root of 311489642 is about 17649.0691539242. The cubic root of 311489642 is about 677.8722722701.

The spelling of 311489642 in words is "three hundred eleven million, four hundred eighty-nine thousand, six hundred forty-two".