311203420 has 48 divisors (see below), whose sum is σ = 735952896. Its totient is φ = 109512000.

The previous prime is 311203391. The next prime is 311203423. The reversal of 311203420 is 24302113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 311203394 and 311203403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311203423) 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 15 ways as a sum of consecutive naturals, for example, 15996 + ... + 29635.

It is an arithmetic number, because the mean of its divisors is an integer number (15332352).

Almost surely, 2^311203420 is an apocalyptic number.

It is an amenable number.

311203420 is an abundant number, since it is smaller than the sum of its proper divisors (424749476).

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

311203420 is a wasteful number, since it uses less digits than its factorization.

311203420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45682 (or 45680 counting only the distinct ones).

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

The square root of 311203420 is about 17640.9585907342. The cubic root of 311203420 is about 677.6645805961.

Adding to 311203420 its reverse (24302113), we get a palindrome (335505533).

The spelling of 311203420 in words is "three hundred eleven million, two hundred three thousand, four hundred twenty".