312220420 has 24 divisors (see below), whose sum is σ = 670912704. Its totient is φ = 121983456.

The previous prime is 312220417. The next prime is 312220421. The reversal of 312220420 is 24022213.

It is a junction number, because it is equal to n+sod(n) for n = 312220394 and 312220403.

It is not an unprimeable number, because it can be changed into a prime (312220421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180664 + ... + 182383.

It is an arithmetic number, because the mean of its divisors is an integer number (27954696).

Almost surely, 2^312220420 is an apocalyptic number.

It is an amenable number.

312220420 is an abundant number, since it is smaller than the sum of its proper divisors (358692284).

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

312220420 is a wasteful number, since it uses less digits than its factorization.

312220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363099 (or 363097 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 312220420 is about 17669.7600436452. The cubic root of 312220420 is about 678.4019712669.

Adding to 312220420 its reverse (24022213), we get a palindrome (336242633).

The spelling of 312220420 in words is "three hundred twelve million, two hundred twenty thousand, four hundred twenty".