311449889 has 8 divisors (see below), whose sum is σ = 317694312. Its totient is φ = 305219200.

The previous prime is 311449841. The next prime is 311449891. The reversal of 311449889 is 988944113.

It can be written as a sum of positive squares in 4 ways, for example, as 62283664 + 249166225 = 7892^2 + 15785^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 311449889 - 2¹² = 311445793 is a prime.

It is a super-2 number, since 2×311449889² = 194002066716224642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311449829) 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, 50789 + ... + 56589.

It is an arithmetic number, because the mean of its divisors is an integer number (39711789).

Almost surely, 2^311449889 is an apocalyptic number.

It is an amenable number.

311449889 is a deficient number, since it is larger than the sum of its proper divisors (6244423).

311449889 is a wasteful number, since it uses less digits than its factorization.

311449889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867.

The product of its digits is 248832, while the sum is 47.

The square root of 311449889 is about 17647.9429112857. The cubic root of 311449889 is about 677.8434338549.

The spelling of 311449889 in words is "three hundred eleven million, four hundred forty-nine thousand, eight hundred eighty-nine".