311623480 has 32 divisors (see below), whose sum is σ = 801318240. Its totient is φ = 106842240.

The previous prime is 311623423. The next prime is 311623519. The reversal of 311623480 is 84326113.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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, 556191 + ... + 556750.

It is an arithmetic number, because the mean of its divisors is an integer number (25041195).

Almost surely, 2^311623480 is an apocalyptic number.

It is an amenable number.

311623480 is an abundant number, since it is smaller than the sum of its proper divisors (489694760).

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

311623480 is a wasteful number, since it uses less digits than its factorization.

311623480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112959 (or 1112955 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 311623480 is about 17652.8603914493. The cubic root of 311623480 is about 677.9693456728.

Adding to 311623480 its reverse (84326113), we get a palindrome (395949593).

The spelling of 311623480 in words is "three hundred eleven million, six hundred twenty-three thousand, four hundred eighty".