311032420 has 12 divisors (see below), whose sum is σ = 653168124. Its totient is φ = 124412960.

The previous prime is 311032361. The next prime is 311032433. The reversal of 311032420 is 24230113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 97930816 + 213101604 = 9896^2 + 14598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311032394 and 311032403.

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, 7775791 + ... + 7775830.

It is an arithmetic number, because the mean of its divisors is an integer number (54430677).

Almost surely, 2^311032420 is an apocalyptic number.

It is an amenable number.

311032420 is an abundant number, since it is smaller than the sum of its proper divisors (342135704).

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

311032420 is a wasteful number, since it uses less digits than its factorization.

311032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15551630 (or 15551628 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 311032420 is about 17636.1112493656. Note that the first 3 decimals coincide. The cubic root of 311032420 is about 677.5404368506.

Adding to 311032420 its reverse (24230113), we get a palindrome (335262533).

The spelling of 311032420 in words is "three hundred eleven million, thirty-two thousand, four hundred twenty".