311404340 has 24 divisors (see below), whose sum is σ = 704253480. Its totient is φ = 114979968.

The previous prime is 311404339. The next prime is 311404343. The reversal of 311404340 is 43404113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17007376 + 294396964 = 4124^2 + 17158^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311404343) 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, 598595 + ... + 599114.

It is an arithmetic number, because the mean of its divisors is an integer number (29343895).

Almost surely, 2^311404340 is an apocalyptic number.

It is an amenable number.

311404340 is an abundant number, since it is smaller than the sum of its proper divisors (392849140).

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

311404340 is a wasteful number, since it uses less digits than its factorization.

311404340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197731 (or 1197729 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 311404340 is about 17646.6523737507. The cubic root of 311404340 is about 677.8103877728.

Adding to 311404340 its reverse (43404113), we get a palindrome (354808453).

The spelling of 311404340 in words is "three hundred eleven million, four hundred four thousand, three hundred forty".