311140420 has 24 divisors (see below), whose sum is σ = 675927000. Its totient is φ = 120164352.

The previous prime is 311140411. The next prime is 311140433. The reversal of 311140420 is 24041113.

It can be written as a sum of positive squares in 4 ways, for example, as 126832644 + 184307776 = 11262^2 + 13576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311140394 and 311140403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267645 + ... + 268804.

It is an arithmetic number, because the mean of its divisors is an integer number (28163625).

Almost surely, 2^311140420 is an apocalyptic number.

It is an amenable number.

311140420 is an abundant number, since it is smaller than the sum of its proper divisors (364786580).

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

311140420 is a wasteful number, since it uses less digits than its factorization.

311140420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536487 (or 536485 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 311140420 is about 17639.1728831031. The cubic root of 311140420 is about 677.6188487188.

Adding to 311140420 its reverse (24041113), we get a palindrome (335181533).

The spelling of 311140420 in words is "three hundred eleven million, one hundred forty thousand, four hundred twenty".